diff --git a/.github/workflows/opensearch.yml b/.github/workflows/opensearch.yml
new file mode 100644
index 0000000000..8e21fcbaba
--- /dev/null
+++ b/.github/workflows/opensearch.yml
@@ -0,0 +1,45 @@
+name: OpenSearch
+on:
+  push:
+    branches:
+    - main
+  pull_request:
+    branches:
+    - main
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    if: ${{ !contains(github.event.head_commit.message, 'docs:') }}
+    steps:
+    - uses: actions/checkout@v4
+    - name: Use Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: '22.x'
+    - name: Install sitespeed.io
+      run: npm ci
+    - name: Install Chrome
+      run: |
+        wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add -
+        sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'
+        sudo apt-get update
+        sudo apt-get --only-upgrade install google-chrome-stable
+        google-chrome --version
+    - name: Install local HTTP server
+      run: npm install serve -g
+    - name: Start local HTTP server
+      run: (serve test/data/html/ -l 3001&)
+    - name: Start OpenSearch
+      run: docker compose -f test/docker/docker-compose.opensearch.yml up -d
+    - name: Wait for OpenSearch
+      run: |
+        timeout 90 bash -c \
+          'until curl -sf http://localhost:9200/_cluster/health | grep -q "\"status\":\"green\"\|\"status\":\"yellow\""; do
+            echo "Waiting for OpenSearch..."; sleep 3
+          done'
+    - name: Apply OpenSearch index templates
+      run: docker/opensearch/setup.sh http://localhost:9200
+    - name: Run test with OpenSearch
+      run: bin/sitespeed.js http://127.0.0.1:3001/simple/ -n 1 --opensearch.host 127.0.0.1 --xvfb
+    - name: Run test with OpenSearch including runs
+      run: bin/sitespeed.js http://127.0.0.1:3001/simple/ -n 1 --opensearch.host 127.0.0.1 --opensearch.includeRuns --xvfb
diff --git a/docker/docker-compose.yml b/docker/docker-compose.yml
index 89b3bc7bde..e1b722542d 100644
--- a/docker/docker-compose.yml
+++ b/docker/docker-compose.yml
@@ -1,10 +1,10 @@
-version: '3'
 services:
     grafana:
       image: grafana/grafana:12.2.0
       hostname: grafana
       depends_on:
         - graphite
+        - opensearch
       links:
         - graphite
       ports:
@@ -16,7 +16,7 @@ services:
         - GF_AUTH_ANONYMOUS_ENABLED=true
         - GF_USERS_ALLOW_SIGN_UP=false
         - GF_USERS_ALLOW_ORG_CREATE=false
-        - GF_INSTALL_PLUGINS=grafana-piechart-panel,marcusolsson-json-datasource,marcusolsson-dynamictext-panel
+        - GF_INSTALL_PLUGINS=grafana-piechart-panel,marcusolsson-json-datasource,marcusolsson-dynamictext-panel,grafana-opensearch-datasource
         - GF_DASHBOARDS_DEFAULT_HOME_DASHBOARD_PATH=/var/lib/grafana/dashboards/Welcome.json
       volumes:
         - grafana:/var/lib/grafana
@@ -38,12 +38,47 @@ services:
         - whisper:/opt/graphite/storage/whisper
         # Download an empty graphite.db from https://github.com/sitespeedio/sitespeed.io/tree/main/docker/graphite
         # - /absolute/path/to/graphite/graphite.db:/opt/graphite/storage/graphite.db
-        # 
+        #
         # And put the configuration files on your server, configure them as you need
         # Download from https://github.com/sitespeedio/docker-graphite-statsd/tree/main/conf/graphite
         # - /absolute/path/to/graphite/conf/storage-schemas.conf:/opt/graphite/conf/storage-schemas.conf
         # - /absolute/path/to/graphite/conf/storage-aggregation.conf:/opt/graphite/conf/storage-aggregation.conf
         # - /absolute/path/to/graphite/conf/carbon.conf:/opt/graphite/conf/carbon.conf
+    opensearch:
+      image: opensearchproject/opensearch:2
+      hostname: opensearch
+      environment:
+        - discovery.type=single-node
+        - DISABLE_SECURITY_PLUGIN=true
+        - OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m
+      ports:
+        - "9200:9200"
+      volumes:
+        - opensearch:/usr/share/opensearch/data
+      healthcheck:
+        test: ["CMD", "curl", "-sf", "http://localhost:9200/_cluster/health"]
+        interval: 10s
+        timeout: 5s
+        retries: 20
+      restart: always
+    opensearch-setup:
+      image: curlimages/curl:latest
+      depends_on:
+        opensearch:
+          condition: service_healthy
+      volumes:
+        - ../docker/opensearch:/setup:ro
+      entrypoint: /bin/sh
+      command:
+        - -c
+        - |
+          for t in pagesummary run pagexray compare coach; do
+            curl -sf -X PUT "http://opensearch:9200/_index_template/sitespeed-$$t" \
+              -H 'Content-Type: application/json' \
+              -d "@/setup/index-template-$$t.json" && echo "Applied index template: sitespeed-$$t"
+          done
+      restart: "no"
 volumes:
     grafana:
     whisper:
+    opensearch:
diff --git a/docker/grafana/provisioning/dashboards/OpenSearch.json b/docker/grafana/provisioning/dashboards/OpenSearch.json
new file mode 100644
index 0000000000..a59a6f281b
--- /dev/null
+++ b/docker/grafana/provisioning/dashboards/OpenSearch.json
@@ -0,0 +1,501 @@
+{
+  "annotations": { "list": [] },
+  "description": "sitespeed.io page summary metrics stored in OpenSearch. Shows timings, Core Web Vitals, and visual metrics per URL.",
+  "editable": true,
+  "graphTooltip": 1,
+  "id": null,
+  "links": [],
+  "panels": [
+    {
+      "collapsed": false,
+      "gridPos": { "h": 1, "w": 24, "x": 0, "y": 0 },
+      "id": 100,
+      "title": "Core Web Vitals",
+      "type": "row"
+    },
+    {
+      "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": { "lineWidth": 2, "fillOpacity": 10 },
+          "unit": "ms",
+          "min": 0,
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              { "color": "green", "value": null },
+              { "color": "yellow", "value": 2500 },
+              { "color": "red", "value": 4000 }
+            ]
+          }
+        }
+      },
+      "gridPos": { "h": 8, "w": 8, "x": 0, "y": 1 },
+      "id": 1,
+      "options": { "tooltip": { "mode": "multi", "sort": "none" } },
+      "targets": [
+        {
+          "alias": "LCP median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "2", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "timings.lcp.median", "id": "1", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "A",
+          "timeField": "@timestamp"
+        },
+        {
+          "alias": "LCP p90",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "4", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "timings.lcp.p90", "id": "3", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "B",
+          "timeField": "@timestamp"
+        }
+      ],
+      "title": "Largest Contentful Paint (LCP)",
+      "type": "timeseries"
+    },
+    {
+      "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": { "lineWidth": 2, "fillOpacity": 10 },
+          "unit": "short",
+          "min": 0,
+          "decimals": 3,
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              { "color": "green", "value": null },
+              { "color": "yellow", "value": 0.1 },
+              { "color": "red", "value": 0.25 }
+            ]
+          }
+        }
+      },
+      "gridPos": { "h": 8, "w": 8, "x": 8, "y": 1 },
+      "id": 2,
+      "options": { "tooltip": { "mode": "multi", "sort": "none" } },
+      "targets": [
+        {
+          "alias": "CLS median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "2", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "googleWebVitals.cls.median", "id": "1", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "A",
+          "timeField": "@timestamp"
+        }
+      ],
+      "title": "Cumulative Layout Shift (CLS)",
+      "type": "timeseries"
+    },
+    {
+      "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": { "lineWidth": 2, "fillOpacity": 10 },
+          "unit": "ms",
+          "min": 0,
+          "thresholds": {
+            "mode": "absolute",
+            "steps": [
+              { "color": "green", "value": null },
+              { "color": "yellow", "value": 200 },
+              { "color": "red", "value": 500 }
+            ]
+          }
+        }
+      },
+      "gridPos": { "h": 8, "w": 8, "x": 16, "y": 1 },
+      "id": 3,
+      "options": { "tooltip": { "mode": "multi", "sort": "none" } },
+      "targets": [
+        {
+          "alias": "INP median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "2", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "googleWebVitals.inp.median", "id": "1", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "A",
+          "timeField": "@timestamp"
+        }
+      ],
+      "title": "Interaction to Next Paint (INP)",
+      "type": "timeseries"
+    },
+    {
+      "collapsed": false,
+      "gridPos": { "h": 1, "w": 24, "x": 0, "y": 9 },
+      "id": 101,
+      "title": "Timings",
+      "type": "row"
+    },
+    {
+      "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": { "lineWidth": 2, "fillOpacity": 10 },
+          "unit": "ms",
+          "min": 0
+        }
+      },
+      "gridPos": { "h": 8, "w": 8, "x": 0, "y": 10 },
+      "id": 4,
+      "options": { "tooltip": { "mode": "multi", "sort": "none" } },
+      "targets": [
+        {
+          "alias": "TTFB median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "2", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "timings.ttfb.median", "id": "1", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "A",
+          "timeField": "@timestamp"
+        },
+        {
+          "alias": "TTFB p90",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "4", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "timings.ttfb.p90", "id": "3", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "B",
+          "timeField": "@timestamp"
+        }
+      ],
+      "title": "Time to First Byte (TTFB)",
+      "type": "timeseries"
+    },
+    {
+      "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": { "lineWidth": 2, "fillOpacity": 10 },
+          "unit": "ms",
+          "min": 0
+        }
+      },
+      "gridPos": { "h": 8, "w": 8, "x": 8, "y": 10 },
+      "id": 5,
+      "options": { "tooltip": { "mode": "multi", "sort": "none" } },
+      "targets": [
+        {
+          "alias": "FCP median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "2", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "timings.fcp.median", "id": "1", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "A",
+          "timeField": "@timestamp"
+        }
+      ],
+      "title": "First Contentful Paint (FCP)",
+      "type": "timeseries"
+    },
+    {
+      "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": { "lineWidth": 2, "fillOpacity": 10 },
+          "unit": "ms",
+          "min": 0
+        }
+      },
+      "gridPos": { "h": 8, "w": 8, "x": 16, "y": 10 },
+      "id": 6,
+      "options": { "tooltip": { "mode": "multi", "sort": "none" } },
+      "targets": [
+        {
+          "alias": "Fully Loaded median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "2", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "timings.fullyLoaded.median", "id": "1", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "A",
+          "timeField": "@timestamp"
+        },
+        {
+          "alias": "Fully Loaded p90",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "4", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "timings.fullyLoaded.p90", "id": "3", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "B",
+          "timeField": "@timestamp"
+        }
+      ],
+      "title": "Fully Loaded",
+      "type": "timeseries"
+    },
+    {
+      "collapsed": false,
+      "gridPos": { "h": 1, "w": 24, "x": 0, "y": 18 },
+      "id": 102,
+      "title": "Visual Metrics (requires video)",
+      "type": "row"
+    },
+    {
+      "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": { "lineWidth": 2, "fillOpacity": 10 },
+          "unit": "ms",
+          "min": 0
+        }
+      },
+      "gridPos": { "h": 8, "w": 8, "x": 0, "y": 19 },
+      "id": 7,
+      "options": { "tooltip": { "mode": "multi", "sort": "none" } },
+      "targets": [
+        {
+          "alias": "Speed Index median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "2", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "visualMetrics.speedIndex.median", "id": "1", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "A",
+          "timeField": "@timestamp"
+        }
+      ],
+      "title": "Speed Index",
+      "type": "timeseries"
+    },
+    {
+      "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": { "lineWidth": 2, "fillOpacity": 10 },
+          "unit": "ms",
+          "min": 0
+        }
+      },
+      "gridPos": { "h": 8, "w": 8, "x": 8, "y": 19 },
+      "id": 8,
+      "options": { "tooltip": { "mode": "multi", "sort": "none" } },
+      "targets": [
+        {
+          "alias": "First Visual Change median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "2", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "visualMetrics.firstVisualChange.median", "id": "1", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "A",
+          "timeField": "@timestamp"
+        },
+        {
+          "alias": "Last Visual Change median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "4", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "visualMetrics.lastVisualChange.median", "id": "3", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "B",
+          "timeField": "@timestamp"
+        }
+      ],
+      "title": "Visual Change",
+      "type": "timeseries"
+    },
+    {
+      "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": { "lineWidth": 2, "fillOpacity": 10 },
+          "unit": "ms",
+          "min": 0
+        }
+      },
+      "gridPos": { "h": 8, "w": 8, "x": 16, "y": 19 },
+      "id": 9,
+      "options": { "tooltip": { "mode": "multi", "sort": "none" } },
+      "targets": [
+        {
+          "alias": "Perceptual Speed Index median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "2", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "visualMetrics.perceptualSpeedIndex.median", "id": "1", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "A",
+          "timeField": "@timestamp"
+        }
+      ],
+      "title": "Perceptual Speed Index",
+      "type": "timeseries"
+    },
+    {
+      "collapsed": false,
+      "gridPos": { "h": 1, "w": 24, "x": 0, "y": 27 },
+      "id": 103,
+      "title": "Page Weight",
+      "type": "row"
+    },
+    {
+      "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": { "lineWidth": 2, "fillOpacity": 10 },
+          "unit": "decbytes",
+          "min": 0
+        }
+      },
+      "gridPos": { "h": 8, "w": 12, "x": 0, "y": 28 },
+      "id": 10,
+      "options": { "tooltip": { "mode": "multi", "sort": "none" } },
+      "targets": [
+        {
+          "alias": "Transfer size median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "2", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "transferSize.median", "id": "1", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "A",
+          "timeField": "@timestamp",
+          "index": "sitespeed-pagexray-*"
+        }
+      ],
+      "title": "Transfer Size",
+      "type": "timeseries"
+    },
+    {
+      "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+      "fieldConfig": {
+        "defaults": {
+          "color": { "mode": "palette-classic" },
+          "custom": { "lineWidth": 2, "fillOpacity": 10 },
+          "unit": "short",
+          "min": 0,
+          "decimals": 0
+        }
+      },
+      "gridPos": { "h": 8, "w": 12, "x": 12, "y": 28 },
+      "id": 11,
+      "options": { "tooltip": { "mode": "multi", "sort": "none" } },
+      "targets": [
+        {
+          "alias": "Requests median",
+          "bucketAggs": [
+            { "field": "@timestamp", "id": "2", "settings": { "interval": "auto", "min_doc_count": "1" }, "type": "date_histogram" }
+          ],
+          "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+          "metrics": [{ "field": "requests.median", "id": "1", "settings": {}, "type": "avg" }],
+          "query": "url:\"$url\" AND browser:\"$browser\" AND connectivity:\"$connectivity\" AND deviceType:\"$deviceType\"",
+          "refId": "A",
+          "timeField": "@timestamp",
+          "index": "sitespeed-pagexray-*"
+        }
+      ],
+      "title": "Requests",
+      "type": "timeseries"
+    }
+  ],
+  "schemaVersion": 38,
+  "tags": ["sitespeed.io", "opensearch", "performance"],
+  "templating": {
+    "list": [
+      {
+        "current": {},
+        "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+        "definition": "{\"find\": \"terms\", \"field\": \"url\"}",
+        "hide": 0,
+        "includeAll": false,
+        "label": "URL",
+        "multi": false,
+        "name": "url",
+        "options": [],
+        "query": "{\"find\": \"terms\", \"field\": \"url\"}",
+        "refresh": 2,
+        "sort": 1,
+        "type": "query"
+      },
+      {
+        "current": {},
+        "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+        "definition": "{\"find\": \"terms\", \"field\": \"browser\"}",
+        "hide": 0,
+        "includeAll": true,
+        "label": "Browser",
+        "multi": false,
+        "name": "browser",
+        "options": [],
+        "query": "{\"find\": \"terms\", \"field\": \"browser\"}",
+        "refresh": 2,
+        "sort": 1,
+        "type": "query"
+      },
+      {
+        "current": {},
+        "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+        "definition": "{\"find\": \"terms\", \"field\": \"connectivity\"}",
+        "hide": 0,
+        "includeAll": true,
+        "label": "Connectivity",
+        "multi": false,
+        "name": "connectivity",
+        "options": [],
+        "query": "{\"find\": \"terms\", \"field\": \"connectivity\"}",
+        "refresh": 2,
+        "sort": 1,
+        "type": "query"
+      },
+      {
+        "current": {},
+        "datasource": { "type": "grafana-opensearch-datasource", "uid": "sitespeed-opensearch" },
+        "definition": "{\"find\": \"terms\", \"field\": \"deviceType\"}",
+        "hide": 0,
+        "includeAll": true,
+        "label": "Device type",
+        "multi": false,
+        "name": "deviceType",
+        "options": [],
+        "query": "{\"find\": \"terms\", \"field\": \"deviceType\"}",
+        "refresh": 2,
+        "sort": 1,
+        "type": "query"
+      }
+    ]
+  },
+  "time": { "from": "now-7d", "to": "now" },
+  "timepicker": {},
+  "timezone": "browser",
+  "title": "sitespeed.io Page Summary (OpenSearch)",
+  "uid": "sitespeed-opensearch-pagesummary",
+  "version": 1
+}
diff --git a/docker/grafana/provisioning/datasources/opensearch.yaml b/docker/grafana/provisioning/datasources/opensearch.yaml
new file mode 100644
index 0000000000..a3762335fb
--- /dev/null
+++ b/docker/grafana/provisioning/datasources/opensearch.yaml
@@ -0,0 +1,19 @@
+apiVersion: 1
+
+datasources:
+  - name: OpenSearch
+    type: grafana-opensearch-datasource
+    access: proxy
+    orgId: 1
+    uid: sitespeed-opensearch
+    url: http://opensearch:9200
+    isDefault: false
+    jsonData:
+      database: sitespeed-pagesummary-*
+      timeField: "@timestamp"
+      version: "2.0.0"
+      flavor: opensearch
+      logMessageField: message
+      logLevelField: level
+    version: 1
+    editable: true
diff --git a/docker/opensearch/docker-compose.yml b/docker/opensearch/docker-compose.yml
new file mode 100644
index 0000000000..840176179c
--- /dev/null
+++ b/docker/opensearch/docker-compose.yml
@@ -0,0 +1,15 @@
+services:
+  opensearch:
+    image: opensearchproject/opensearch:2
+    environment:
+      - discovery.type=single-node
+      - DISABLE_SECURITY_PLUGIN=true
+      - OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m
+    ports:
+      - "9200:9200"
+    healthcheck:
+      test: ["CMD", "curl", "-sf", "http://localhost:9200/_cluster/health"]
+      interval: 5s
+      timeout: 5s
+      retries: 20
+
diff --git a/docker/opensearch/index-template-coach.json b/docker/opensearch/index-template-coach.json
new file mode 100644
index 0000000000..4cd0ea0139
--- /dev/null
+++ b/docker/opensearch/index-template-coach.json
@@ -0,0 +1,41 @@
+{
+  "index_patterns": ["sitespeed-coach-*"],
+  "template": {
+    "settings": {
+      "number_of_shards": 1,
+      "number_of_replicas": 0,
+      "plugins.index_state_management.policy_id": "sitespeed-default-retention"
+    },
+    "mappings": {
+      "dynamic": "strict",
+      "properties": {
+        "@timestamp":  { "type": "date" },
+        "url":         { "type": "keyword" },
+        "group":       { "type": "keyword" },
+        "alias":       { "type": "keyword" },
+        "browser":     { "type": "keyword" },
+        "connectivity":{ "type": "keyword" },
+        "slug":        { "type": "keyword" },
+        "type":        { "type": "keyword" },
+        "resultUrl":   { "type": "keyword" },
+        "deviceType":  { "type": "keyword" },
+        "iterations":  { "type": "integer" },
+        "name":        { "type": "keyword" },
+        "score":        { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+        "performance":  { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+        "privacy":      { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+        "bestpractice": { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+        "info": {
+          "properties": {
+            "documentHeight":  { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "domElements":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "domDepth":        { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "iframes":         { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "scripts":         { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "localStorageSize":{ "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/docker/opensearch/index-template-compare.json b/docker/opensearch/index-template-compare.json
new file mode 100644
index 0000000000..3cd838b3c2
--- /dev/null
+++ b/docker/opensearch/index-template-compare.json
@@ -0,0 +1,72 @@
+{
+  "index_patterns": ["sitespeed-compare-*"],
+  "template": {
+    "settings": {
+      "number_of_shards": 1,
+      "number_of_replicas": 0,
+      "plugins.index_state_management.policy_id": "sitespeed-default-retention"
+    },
+    "mappings": {
+      "dynamic": "strict",
+      "properties": {
+        "@timestamp":        { "type": "date" },
+        "url":               { "type": "keyword" },
+        "group":             { "type": "keyword" },
+        "alias":             { "type": "keyword" },
+        "browser":           { "type": "keyword" },
+        "connectivity":      { "type": "keyword" },
+        "slug":              { "type": "keyword" },
+        "type":              { "type": "keyword" },
+        "resultUrl":         { "type": "keyword" },
+        "deviceType":        { "type": "keyword" },
+        "iterations":        { "type": "integer" },
+        "name":              { "type": "keyword" },
+        "baselineTimestamp": { "type": "keyword" },
+        "anySignificant":    { "type": "boolean" },
+        "significantMetrics":{ "type": "keyword" },
+        "timings": {
+          "properties": {
+            "ttfb":        { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "fcp":         { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "fullyLoaded": { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "loadEventEnd":{ "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } }
+          }
+        },
+        "visualMetrics": {
+          "properties": {
+            "speedIndex":           { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "perceptualSpeedIndex": { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "firstVisualChange":    { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "lastVisualChange":     { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "contentfulSpeedIndex": { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } }
+          }
+        },
+        "googleWebVitals": {
+          "properties": {
+            "lcp": { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "cls": { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "inp": { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "fid": { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } }
+          }
+        },
+        "cpu": {
+          "properties": {
+            "totalDuration": { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "tasks":         { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "lastLongTask":  { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "beforeFCP":     { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "beforeLCP":     { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } }
+          }
+        },
+        "renderBlocking": {
+          "properties": {
+            "beforeFCPms":       { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "beforeLCPms":       { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "beforeFCPelements": { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } },
+            "beforeLCPelements": { "properties": { "isSignificant": { "type": "boolean" }, "cliffsDelta": { "type": "float" }, "pValue": { "type": "float" }, "currentMedian": { "type": "float" }, "baselineMedian": { "type": "float" } } }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/docker/opensearch/index-template-pagesummary.json b/docker/opensearch/index-template-pagesummary.json
new file mode 100644
index 0000000000..a09c92d8f7
--- /dev/null
+++ b/docker/opensearch/index-template-pagesummary.json
@@ -0,0 +1,69 @@
+{
+  "index_patterns": ["sitespeed-pagesummary-*"],
+  "template": {
+    "settings": {
+      "number_of_shards": 1,
+      "number_of_replicas": 0,
+      "plugins.index_state_management.policy_id": "sitespeed-default-retention"
+    },
+    "mappings": {
+      "dynamic": "strict",
+      "properties": {
+        "@timestamp":  { "type": "date" },
+        "url":         { "type": "keyword" },
+        "group":       { "type": "keyword" },
+        "alias":       { "type": "keyword" },
+        "browser":     { "type": "keyword" },
+        "connectivity":{ "type": "keyword" },
+        "slug":        { "type": "keyword" },
+        "type":        { "type": "keyword" },
+        "resultUrl":   { "type": "keyword" },
+        "deviceType":  { "type": "keyword" },
+        "iterations":  { "type": "integer" },
+        "name":        { "type": "keyword" },
+        "timings": {
+          "properties": {
+            "firstPaint":       { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "fcp":              { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "lcp":              { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "ttfb":             { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "fullyLoaded":      { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "loadEventEnd":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "timeToInteractive":{ "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+          }
+        },
+        "visualMetrics": {
+          "properties": {
+            "speedIndex":           { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "perceptualSpeedIndex": { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "firstVisualChange":    { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "lastVisualChange":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "visualComplete85":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "visualComplete95":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "visualComplete99":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+          }
+        },
+        "googleWebVitals": {
+          "properties": {
+            "lcp": { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "cls": { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "inp": { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "fid": { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+          }
+        },
+        "cpu": {
+          "properties": {
+            "longTasksTotalDuration": { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "longTasksCount":        { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+          }
+        },
+        "pageInfo": {
+          "properties": {
+            "cumulativeLayoutShift": { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+            "domElements":           { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/docker/opensearch/index-template-pagexray.json b/docker/opensearch/index-template-pagexray.json
new file mode 100644
index 0000000000..59d69837ed
--- /dev/null
+++ b/docker/opensearch/index-template-pagexray.json
@@ -0,0 +1,92 @@
+{
+  "index_patterns": ["sitespeed-pagexray-*"],
+  "template": {
+    "settings": {
+      "number_of_shards": 1,
+      "number_of_replicas": 0,
+      "plugins.index_state_management.policy_id": "sitespeed-default-retention"
+    },
+    "mappings": {
+      "dynamic": "strict",
+      "properties": {
+        "@timestamp":  { "type": "date" },
+        "url":         { "type": "keyword" },
+        "group":       { "type": "keyword" },
+        "alias":       { "type": "keyword" },
+        "browser":     { "type": "keyword" },
+        "connectivity":{ "type": "keyword" },
+        "slug":        { "type": "keyword" },
+        "type":        { "type": "keyword" },
+        "resultUrl":   { "type": "keyword" },
+        "deviceType":  { "type": "keyword" },
+        "iterations":  { "type": "integer" },
+        "name":        { "type": "keyword" },
+        "totalDomains":{ "type": "integer" },
+        "transferSize":{ "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+        "contentSize": { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+        "requests":    { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+        "cookies":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } },
+        "firstParty": {
+          "properties": {
+            "transferSize": { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+            "contentSize":  { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+            "requests":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+          }
+        },
+        "thirdParty": {
+          "properties": {
+            "transferSize": { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+            "contentSize":  { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+            "requests":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+          }
+        },
+        "contentTypes": {
+          "properties": {
+            "javascript": {
+              "properties": {
+                "transferSize": { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "contentSize":  { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "requests":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+              }
+            },
+            "css": {
+              "properties": {
+                "transferSize": { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "contentSize":  { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "requests":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+              }
+            },
+            "image": {
+              "properties": {
+                "transferSize": { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "contentSize":  { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "requests":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+              }
+            },
+            "html": {
+              "properties": {
+                "transferSize": { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "contentSize":  { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "requests":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+              }
+            },
+            "font": {
+              "properties": {
+                "transferSize": { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "contentSize":  { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "requests":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+              }
+            },
+            "other": {
+              "properties": {
+                "transferSize": { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "contentSize":  { "properties": { "median": { "type": "long" }, "p90": { "type": "long" }, "rsd": { "type": "float" } } },
+                "requests":     { "properties": { "median": { "type": "float" }, "p90": { "type": "float" }, "rsd": { "type": "float" } } }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/docker/opensearch/index-template-run.json b/docker/opensearch/index-template-run.json
new file mode 100644
index 0000000000..37391f2553
--- /dev/null
+++ b/docker/opensearch/index-template-run.json
@@ -0,0 +1,69 @@
+{
+  "index_patterns": ["sitespeed-run-*"],
+  "template": {
+    "settings": {
+      "number_of_shards": 1,
+      "number_of_replicas": 0,
+      "plugins.index_state_management.policy_id": "sitespeed-run-retention"
+    },
+    "mappings": {
+      "dynamic": "strict",
+      "properties": {
+        "@timestamp":  { "type": "date" },
+        "url":         { "type": "keyword" },
+        "group":       { "type": "keyword" },
+        "alias":       { "type": "keyword" },
+        "browser":     { "type": "keyword" },
+        "connectivity":{ "type": "keyword" },
+        "slug":        { "type": "keyword" },
+        "type":        { "type": "keyword" },
+        "resultUrl":   { "type": "keyword" },
+        "deviceType":  { "type": "keyword" },
+        "iterations":  { "type": "integer" },
+        "iteration":   { "type": "integer" },
+        "name":        { "type": "keyword" },
+        "timings": {
+          "properties": {
+            "firstPaint":  { "type": "float" },
+            "fcp":         { "type": "float" },
+            "lcp":         { "type": "float" },
+            "ttfb":        { "type": "float" },
+            "fullyLoaded": { "type": "float" },
+            "loadEventEnd":{ "type": "float" }
+          }
+        },
+        "visualMetrics": {
+          "properties": {
+            "speedIndex":           { "type": "float" },
+            "perceptualSpeedIndex": { "type": "float" },
+            "firstVisualChange":    { "type": "float" },
+            "lastVisualChange":     { "type": "float" },
+            "visualComplete85":     { "type": "float" },
+            "visualComplete95":     { "type": "float" },
+            "visualComplete99":     { "type": "float" }
+          }
+        },
+        "googleWebVitals": {
+          "properties": {
+            "lcp": { "type": "float" },
+            "cls": { "type": "float" },
+            "inp": { "type": "float" },
+            "fid": { "type": "float" }
+          }
+        },
+        "cpu": {
+          "properties": {
+            "longTasksTotalDuration": { "type": "float" },
+            "longTasksCount":         { "type": "float" }
+          }
+        },
+        "pageInfo": {
+          "properties": {
+            "cumulativeLayoutShift": { "type": "float" },
+            "domElements":           { "type": "integer" }
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/docker/opensearch/ism-policy-default.json b/docker/opensearch/ism-policy-default.json
new file mode 100644
index 0000000000..8931962267
--- /dev/null
+++ b/docker/opensearch/ism-policy-default.json
@@ -0,0 +1,25 @@
+{
+  "policy": {
+    "description": "Delete sitespeed summary indices after 90 days. Page summaries, pagexray and compare data are kept longer for trend analysis.",
+    "default_state": "hot",
+    "states": [
+      {
+        "name": "hot",
+        "actions": [],
+        "transitions": [
+          {
+            "state_name": "delete",
+            "conditions": {
+              "min_index_age": "90d"
+            }
+          }
+        ]
+      },
+      {
+        "name": "delete",
+        "actions": [{ "delete": {} }],
+        "transitions": []
+      }
+    ]
+  }
+}
diff --git a/docker/opensearch/ism-policy-run.json b/docker/opensearch/ism-policy-run.json
new file mode 100644
index 0000000000..e3d07cbfad
--- /dev/null
+++ b/docker/opensearch/ism-policy-run.json
@@ -0,0 +1,25 @@
+{
+  "policy": {
+    "description": "Delete sitespeed run indices after 7 days. Run-level data is only useful for short-term debugging.",
+    "default_state": "hot",
+    "states": [
+      {
+        "name": "hot",
+        "actions": [],
+        "transitions": [
+          {
+            "state_name": "delete",
+            "conditions": {
+              "min_index_age": "7d"
+            }
+          }
+        ]
+      },
+      {
+        "name": "delete",
+        "actions": [{ "delete": {} }],
+        "transitions": []
+      }
+    ]
+  }
+}
diff --git a/docker/opensearch/setup.sh b/docker/opensearch/setup.sh
new file mode 100755
index 0000000000..fd185cd7a0
--- /dev/null
+++ b/docker/opensearch/setup.sh
@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+# Apply sitespeed.io index templates to OpenSearch.
+# ISM retention policies are created automatically by the sitespeed.io
+# OpenSearch plugin on first run (configurable via --opensearch.retentionDays
+# and --opensearch.runRetentionDays).
+#
+# Usage:
+#   ./setup.sh                        # connects to http://localhost:9200
+#   ./setup.sh http://my-host:9200
+#   ./setup.sh http://my-host:9200 user:password
+
+set -e
+
+HOST="${1:-http://localhost:9200}"
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+CURL_OPTS=(-sf -H 'Content-Type: application/json')
+if [ -n "$2" ]; then
+  CURL_OPTS+=(-u "$2")
+fi
+
+echo "Applying sitespeed.io index templates to OpenSearch at $HOST"
+
+for template in pagesummary run pagexray compare coach; do
+  echo "  -> sitespeed-${template}"
+  curl "${CURL_OPTS[@]}" -X PUT "$HOST/_index_template/sitespeed-${template}" \
+    -d @"$DIR/index-template-${template}.json"
+  echo
+done
+
+echo "Done. Start sitespeed.io with --opensearch.host to activate the plugin."
+echo "ISM retention policies will be created on first run."
diff --git a/lib/cli/cli.js b/lib/cli/cli.js
index 4eea280fd3..c908346d12 100644
--- a/lib/cli/cli.js
+++ b/lib/cli/cli.js
@@ -20,6 +20,7 @@ import { addOptions as addSafariOptions } from './options/safari.js';
 import { addOptions as addAndroidOptions } from './options/android.js';
 import { addOptions as addScreenshotOptions } from './options/screenshot.js';
 import { addOptions as addGraphiteOptions } from './options/graphite.js';
+import { addOptions as addOpensearchOptions } from './options/opensearch.js';
 import { addOptions as addGrafanaOptions } from './options/grafana.js';
 import { addOptions as addHtmlOptions } from './options/html.js';
 import { addOptions as addSlackOptions } from './options/slack.js';
@@ -64,6 +65,7 @@ export async function parseCommandLine() {
   addAndroidOptions(yargsInstance);
   addScreenshotOptions(yargsInstance);
   addGraphiteOptions(yargsInstance);
+  addOpensearchOptions(yargsInstance);
   addGrafanaOptions(yargsInstance);
   addHtmlOptions(yargsInstance);
   addSlackOptions(yargsInstance);
diff --git a/lib/cli/options/opensearch.js b/lib/cli/options/opensearch.js
new file mode 100644
index 0000000000..0ebb84b5bc
--- /dev/null
+++ b/lib/cli/options/opensearch.js
@@ -0,0 +1,53 @@
+export function addOptions(yargs) {
+  yargs
+    .option('opensearch.host', {
+      describe: 'The OpenSearch host to store captured metrics.',
+      group: 'OpenSearch'
+    })
+    .option('opensearch.port', {
+      default: 9200,
+      describe: 'The OpenSearch port.',
+      group: 'OpenSearch'
+    })
+    .option('opensearch.index', {
+      default: 'sitespeed',
+      describe:
+        'The index name prefix. Indices are created as {prefix}-pagesummary-YYYY.MM.DD, {prefix}-run-YYYY.MM.DD and {prefix}-compare-YYYY.MM.DD.',
+      group: 'OpenSearch'
+    })
+    .option('opensearch.secure', {
+      default: false,
+      type: 'boolean',
+      describe: 'Use HTTPS when connecting to OpenSearch.',
+      group: 'OpenSearch'
+    })
+    .option('opensearch.username', {
+      describe: 'OpenSearch username for Basic Auth.',
+      group: 'OpenSearch'
+    })
+    .option('opensearch.password', {
+      describe: 'OpenSearch password for Basic Auth.',
+      group: 'OpenSearch'
+    })
+    .option('opensearch.includeRuns', {
+      default: false,
+      type: 'boolean',
+      describe:
+        'Send per-iteration run data to OpenSearch in addition to page summaries.',
+      group: 'OpenSearch'
+    })
+    .option('opensearch.runRetentionDays', {
+      default: 7,
+      type: 'number',
+      describe:
+        'Number of days to retain per-iteration run data in OpenSearch.',
+      group: 'OpenSearch'
+    })
+    .option('opensearch.retentionDays', {
+      default: 90,
+      type: 'number',
+      describe:
+        'Number of days to retain page summary, pagexray, coach and compare data in OpenSearch.',
+      group: 'OpenSearch'
+    });
+}
diff --git a/lib/plugins/opensearch/data-generator.js b/lib/plugins/opensearch/data-generator.js
new file mode 100644
index 0000000000..5fa3e4b8e2
--- /dev/null
+++ b/lib/plugins/opensearch/data-generator.js
@@ -0,0 +1,355 @@
+import get from 'lodash.get';
+import { getConnectivity } from '../../support/tsdbUtil.js';
+
+function getDeviceType(options) {
+  if (options.safari?.ios || options.browsertime?.safari?.ios) return 'ios';
+  if (options.android?.enabled || options.browsertime?.android?.enabled)
+    return 'android';
+  if (options.mobile) return 'mobile';
+  return 'desktop';
+}
+
+/**
+ * Extract a statistics object (median/p90/p99) from a data path.
+ * Returns undefined if the path doesn't exist or has no numeric stats.
+ */
+function stat(data, path) {
+  const s = get(data, path);
+  if (!s || typeof s !== 'object') return;
+  const result = {};
+  if (typeof s.median === 'number') result.median = s.median;
+  if (typeof s.p90 === 'number') result.p90 = s.p90;
+  if (typeof s.rsd === 'number') result.rsd = s.rsd;
+  return Object.keys(result).length > 0 ? result : undefined;
+}
+
+/**
+ * Strip undefined/null/empty-object entries so we don't send empty
+ * nested objects to OpenSearch (which would still create mapping entries).
+ */
+function compact(obj) {
+  return Object.fromEntries(
+    Object.entries(obj).filter(([, v]) => {
+      if (v === undefined || v === null) return false;
+      if (
+        typeof v === 'object' &&
+        !Array.isArray(v) &&
+        Object.keys(v).length === 0
+      )
+        return false;
+      return true;
+    })
+  );
+}
+
+function baseDoc(message, options, alias, resultUrls) {
+  const doc = {
+    '@timestamp': new Date(message.runTime ?? Date.now()).toISOString(),
+    url: message.url,
+    group: message.group,
+    alias: alias?.[message.url],
+    browser: options.browser,
+    connectivity: getConnectivity(options),
+    slug: options.slug,
+    deviceType: getDeviceType(options),
+    iterations: options.browsertime?.iterations,
+    name: options.name
+  };
+  if (resultUrls?.hasBaseUrl()) {
+    doc.resultUrl =
+      resultUrls.absoluteSummaryPagePath(message.url, alias?.[message.url]) +
+      'index.html';
+  }
+  return doc;
+}
+
+export class OpenSearchDataGenerator {
+  constructor(options) {
+    this.options = options;
+  }
+
+  documentFromMessage(message, alias, resultUrls) {
+    switch (message.type) {
+      case 'browsertime.pageSummary': {
+        return this.fromPageSummary(message, alias, resultUrls);
+      }
+      case 'browsertime.run': {
+        return this.fromRun(message, alias, resultUrls);
+      }
+      case 'compare.pageSummary': {
+        return this.fromCompare(message, alias, resultUrls);
+      }
+      case 'pagexray.pageSummary': {
+        return this.fromPageXray(message, alias, resultUrls);
+      }
+      case 'coach.pageSummary': {
+        return this.fromCoach(message, alias, resultUrls);
+      }
+      default: {
+        return;
+      }
+    }
+  }
+
+  fromPageSummary(message, alias, resultUrls) {
+    const d = message.data;
+
+    return compact({
+      ...baseDoc(message, this.options, alias, resultUrls),
+      type: 'pageSummary',
+      timings: compact({
+        firstPaint: stat(d, 'statistics.timings.firstPaint'),
+        fcp: stat(d, 'statistics.timings.timeToContentfulPaint'),
+        lcp: stat(d, 'statistics.timings.largestContentfulPaint.renderTime'),
+        ttfb: stat(d, 'statistics.timings.ttfb'),
+        fullyLoaded: stat(d, 'statistics.timings.fullyLoaded'),
+        loadEventEnd: stat(d, 'statistics.timings.loadEventEnd'),
+        timeToInteractive: stat(d, 'statistics.timings.timeToFirstInteractive')
+      }),
+      visualMetrics: compact({
+        speedIndex: stat(d, 'statistics.visualMetrics.SpeedIndex'),
+        perceptualSpeedIndex: stat(
+          d,
+          'statistics.visualMetrics.PerceptualSpeedIndex'
+        ),
+        firstVisualChange: stat(
+          d,
+          'statistics.visualMetrics.FirstVisualChange'
+        ),
+        lastVisualChange: stat(d, 'statistics.visualMetrics.LastVisualChange'),
+        visualComplete85: stat(d, 'statistics.visualMetrics.VisualComplete85'),
+        visualComplete95: stat(d, 'statistics.visualMetrics.VisualComplete95'),
+        visualComplete99: stat(d, 'statistics.visualMetrics.VisualComplete99')
+      }),
+      googleWebVitals: compact({
+        lcp: stat(d, 'statistics.googleWebVitals.largestContentfulPaint'),
+        cls: stat(d, 'statistics.googleWebVitals.cumulativeLayoutShift'),
+        inp: stat(d, 'statistics.googleWebVitals.interactionToNextPaint'),
+        fid: stat(d, 'statistics.googleWebVitals.firstInputDelay')
+      }),
+      cpu: compact({
+        longTasksTotalDuration: stat(
+          d,
+          'statistics.cpu.longTasks.totalDuration'
+        ),
+        longTasksCount: stat(d, 'statistics.cpu.longTasks.count')
+      }),
+      pageInfo: compact({
+        cumulativeLayoutShift: stat(
+          d,
+          'statistics.pageinfo.cumulativeLayoutShift'
+        ),
+        domElements: stat(d, 'statistics.pageinfo.domElements')
+      })
+    });
+  }
+
+  fromCompare(message, alias, resultUrls) {
+    const d = message.data;
+
+    // Extract a single metric's compare result into a flat, safe shape.
+    // We store isSignificant as a boolean (the raw value is cliffsDelta or 0).
+    function cm(group, metricName) {
+      const m = get(d, `metrics.${group}.${metricName}`);
+      if (!m) return;
+      return compact({
+        isSignificant: m.isSignificant !== 0,
+        cliffsDelta:
+          typeof m.cliffsDelta === 'number' ? m.cliffsDelta : undefined,
+        pValue:
+          typeof m.statisticalTestU === 'number'
+            ? m.statisticalTestU
+            : undefined,
+        currentMedian:
+          typeof m.current?.median === 'number' ? m.current.median : undefined,
+        baselineMedian:
+          typeof m.baseline?.median === 'number' ? m.baseline.median : undefined
+      });
+    }
+
+    // Collect the dotted paths of any metric that is statistically significant.
+    const TRACKED = {
+      timings: ['ttfb', 'firstContentfulPaint', 'fullyLoaded', 'loadEventEnd'],
+      visualMetrics: [
+        'SpeedIndex',
+        'PerceptualSpeedIndex',
+        'FirstVisualChange',
+        'LastVisualChange',
+        'ContentfulSpeedIndex'
+      ],
+      googleWebVitals: [
+        'largestContentfulPaint',
+        'cumulativeLayoutShift',
+        'interactionToNextPaint',
+        'firstInputDelay'
+      ],
+      cpu: [
+        'totalDuration',
+        'tasks',
+        'lastLongTask',
+        'beforeFirstContentfulPaint',
+        'beforeLargestContentfulPaint'
+      ],
+      renderBlocking: [
+        'beforeFCPms',
+        'beforeLCPms',
+        'beforeFCPelements',
+        'beforeLCPelements'
+      ]
+    };
+
+    const significantMetrics = [];
+    for (const [group, names] of Object.entries(TRACKED)) {
+      for (const name of names) {
+        const m = get(d, `metrics.${group}.${name}`);
+        if (m && m.isSignificant !== 0) {
+          significantMetrics.push(`${group}.${name}`);
+        }
+      }
+    }
+
+    return compact({
+      ...baseDoc(message, this.options, alias, resultUrls),
+      type: 'compare',
+      iterations: get(d, 'meta.iterations'),
+      baselineTimestamp: get(d, 'meta.baseline.timestamp'),
+      anySignificant: significantMetrics.length > 0,
+      significantMetrics:
+        significantMetrics.length > 0 ? significantMetrics : undefined,
+      timings: compact({
+        ttfb: cm('timings', 'ttfb'),
+        fcp: cm('timings', 'firstContentfulPaint'),
+        fullyLoaded: cm('timings', 'fullyLoaded'),
+        loadEventEnd: cm('timings', 'loadEventEnd')
+      }),
+      visualMetrics: compact({
+        speedIndex: cm('visualMetrics', 'SpeedIndex'),
+        perceptualSpeedIndex: cm('visualMetrics', 'PerceptualSpeedIndex'),
+        firstVisualChange: cm('visualMetrics', 'FirstVisualChange'),
+        lastVisualChange: cm('visualMetrics', 'LastVisualChange'),
+        contentfulSpeedIndex: cm('visualMetrics', 'ContentfulSpeedIndex')
+      }),
+      googleWebVitals: compact({
+        lcp: cm('googleWebVitals', 'largestContentfulPaint'),
+        cls: cm('googleWebVitals', 'cumulativeLayoutShift'),
+        inp: cm('googleWebVitals', 'interactionToNextPaint'),
+        fid: cm('googleWebVitals', 'firstInputDelay')
+      }),
+      cpu: compact({
+        totalDuration: cm('cpu', 'totalDuration'),
+        tasks: cm('cpu', 'tasks'),
+        lastLongTask: cm('cpu', 'lastLongTask'),
+        beforeFCP: cm('cpu', 'beforeFirstContentfulPaint'),
+        beforeLCP: cm('cpu', 'beforeLargestContentfulPaint')
+      }),
+      renderBlocking: compact({
+        beforeFCPms: cm('renderBlocking', 'beforeFCPms'),
+        beforeLCPms: cm('renderBlocking', 'beforeLCPms'),
+        beforeFCPelements: cm('renderBlocking', 'beforeFCPelements'),
+        beforeLCPelements: cm('renderBlocking', 'beforeLCPelements')
+      })
+    });
+  }
+
+  fromCoach(message, alias, resultUrls) {
+    const d = message.data;
+
+    return compact({
+      ...baseDoc(message, this.options, alias, resultUrls),
+      type: 'coach',
+      score: stat(d, 'advice.score'),
+      performance: stat(d, 'advice.performance.score'),
+      privacy: stat(d, 'advice.privacy.score'),
+      bestpractice: stat(d, 'advice.bestpractice.score'),
+      info: compact({
+        documentHeight: stat(d, 'advice.info.documentHeight'),
+        domElements: stat(d, 'advice.info.domElements'),
+        domDepth: stat(d, 'advice.info.domDepth'),
+        iframes: stat(d, 'advice.info.iframes'),
+        scripts: stat(d, 'advice.info.scripts'),
+        localStorageSize: stat(d, 'advice.info.localStorageSize')
+      })
+    });
+  }
+
+  fromPageXray(message, alias, resultUrls) {
+    const d = message.data;
+
+    function ct(type) {
+      return compact({
+        transferSize: stat(d, `contentTypes.${type}.transferSize`),
+        contentSize: stat(d, `contentTypes.${type}.contentSize`),
+        requests: stat(d, `contentTypes.${type}.requests`)
+      });
+    }
+
+    return compact({
+      ...baseDoc(message, this.options, alias, resultUrls),
+      type: 'pagexray',
+      transferSize: stat(d, 'transferSize'),
+      contentSize: stat(d, 'contentSize'),
+      requests: stat(d, 'requests'),
+      totalDomains: get(d, 'totalDomains'),
+      cookies: stat(d, 'cookies'),
+      firstParty: compact({
+        transferSize: stat(d, 'firstParty.transferSize'),
+        contentSize: stat(d, 'firstParty.contentSize'),
+        requests: stat(d, 'firstParty.requests')
+      }),
+      thirdParty: compact({
+        transferSize: stat(d, 'thirdParty.transferSize'),
+        contentSize: stat(d, 'thirdParty.contentSize'),
+        requests: stat(d, 'thirdParty.requests')
+      }),
+      contentTypes: compact({
+        javascript: ct('javascript'),
+        css: ct('css'),
+        image: ct('image'),
+        html: ct('html'),
+        font: ct('font'),
+        other: ct('other')
+      })
+    });
+  }
+
+  fromRun(message, alias, resultUrls) {
+    const d = message.data;
+
+    return compact({
+      ...baseDoc(message, this.options, alias, resultUrls),
+      type: 'run',
+      iteration: message.iteration,
+      timings: compact({
+        firstPaint: get(d, 'timings.firstPaint'),
+        fcp: get(d, 'timings.timeToContentfulPaint'),
+        lcp: get(d, 'timings.largestContentfulPaint.renderTime'),
+        ttfb: get(d, 'timings.ttfb'),
+        fullyLoaded: get(d, 'timings.fullyLoaded'),
+        loadEventEnd: get(d, 'timings.loadEventEnd')
+      }),
+      visualMetrics: compact({
+        speedIndex: get(d, 'visualMetrics.SpeedIndex'),
+        perceptualSpeedIndex: get(d, 'visualMetrics.PerceptualSpeedIndex'),
+        firstVisualChange: get(d, 'visualMetrics.FirstVisualChange'),
+        lastVisualChange: get(d, 'visualMetrics.LastVisualChange'),
+        visualComplete85: get(d, 'visualMetrics.VisualComplete85'),
+        visualComplete95: get(d, 'visualMetrics.VisualComplete95'),
+        visualComplete99: get(d, 'visualMetrics.VisualComplete99')
+      }),
+      googleWebVitals: compact({
+        lcp: get(d, 'googleWebVitals.largestContentfulPaint'),
+        cls: get(d, 'googleWebVitals.cumulativeLayoutShift'),
+        inp: get(d, 'googleWebVitals.interactionToNextPaint'),
+        fid: get(d, 'googleWebVitals.firstInputDelay')
+      }),
+      cpu: compact({
+        longTasksTotalDuration: get(d, 'cpu.longTasks.totalDuration'),
+        longTasksCount: get(d, 'cpu.longTasks.count')
+      }),
+      pageInfo: compact({
+        cumulativeLayoutShift: get(d, 'pageinfo.cumulativeLayoutShift'),
+        domElements: get(d, 'pageinfo.domElements')
+      })
+    });
+  }
+}
diff --git a/lib/plugins/opensearch/index.js b/lib/plugins/opensearch/index.js
new file mode 100644
index 0000000000..eeb5f4b65b
--- /dev/null
+++ b/lib/plugins/opensearch/index.js
@@ -0,0 +1,97 @@
+import { getLogger } from '@sitespeed.io/log';
+import { SitespeedioPlugin } from '@sitespeed.io/plugin';
+
+import { throwIfMissing } from '../../support/util.js';
+import { OpenSearchSender } from './sender.js';
+import { OpenSearchDataGenerator } from './data-generator.js';
+
+const log = getLogger('sitespeedio.plugin.opensearch');
+
+export default class OpenSearchPlugin extends SitespeedioPlugin {
+  constructor(options, context, queue) {
+    super({ name: 'opensearch', options, context, queue });
+  }
+
+  async open(context, options) {
+    throwIfMissing(options.opensearch, ['host'], 'opensearch');
+
+    const o = options.opensearch;
+    this.options = options;
+    this.dataGenerator = new OpenSearchDataGenerator(options);
+    this.sender = new OpenSearchSender(o.host, o.port, o.index, {
+      secure: o.secure ?? false,
+      username: o.username,
+      password: o.password
+    });
+    this.alias = {};
+    this.resultUrls = context.resultUrls;
+    this.includeRuns = o.includeRuns ?? false;
+
+    const runDays = o.runRetentionDays ?? 7;
+    const defaultDays = o.retentionDays ?? 90;
+
+    log.info(
+      'Setting up OpenSearch %s:%s index prefix: %s, run retention: %dd, summary retention: %dd',
+      o.host,
+      o.port ?? 9200,
+      o.index ?? 'sitespeed',
+      runDays,
+      defaultDays
+    );
+
+    try {
+      await this.sender.putISMPolicy('sitespeed-run-retention', `${runDays}d`);
+      await this.sender.putISMPolicy(
+        'sitespeed-default-retention',
+        `${defaultDays}d`
+      );
+      log.debug('OpenSearch ISM retention policies created/updated');
+    } catch (error) {
+      log.warning(
+        'Could not create OpenSearch ISM retention policies: %s',
+        error.message
+      );
+    }
+  }
+
+  processMessage(message) {
+    if (message.type === 'browsertime.alias') {
+      this.alias[message.url] = message.data;
+      return;
+    }
+
+    if (message.type === 'browsertime.run' && !this.includeRuns) {
+      return;
+    }
+
+    if (message.group === 'total') {
+      return;
+    }
+
+    const doc = this.dataGenerator.documentFromMessage(
+      message,
+      this.alias,
+      this.resultUrls
+    );
+    if (!doc) return;
+
+    const INDEX_TYPES = {
+      'browsertime.pageSummary': 'pagesummary',
+      'browsertime.run': 'run',
+      'pagexray.pageSummary': 'pagexray',
+      'compare.pageSummary': 'compare',
+      'coach.pageSummary': 'coach'
+    };
+    const indexType = INDEX_TYPES[message.type] ?? 'pagesummary';
+
+    return this.sender
+      .bulk([doc], this.sender.indexName(indexType))
+      .catch(error => {
+        log.error(
+          'Failed to send %s to OpenSearch: %s',
+          message.type,
+          error.message
+        );
+      });
+  }
+}
diff --git a/lib/plugins/opensearch/sender.js b/lib/plugins/opensearch/sender.js
new file mode 100644
index 0000000000..0e64c99b00
--- /dev/null
+++ b/lib/plugins/opensearch/sender.js
@@ -0,0 +1,99 @@
+import { getLogger } from '@sitespeed.io/log';
+
+const log = getLogger('sitespeedio.plugin.opensearch');
+
+export class OpenSearchSender {
+  constructor(host, port, index, options = {}) {
+    this.baseUrl = `${options.secure ? 'https' : 'http'}://${host}:${port || 9200}`;
+    this.indexPrefix = index || 'sitespeed';
+    if (options.username && options.password) {
+      const encoded = Buffer.from(
+        `${options.username}:${options.password}`
+      ).toString('base64');
+      this.authHeader = `Basic ${encoded}`;
+    }
+  }
+
+  indexName(type) {
+    const date = new Date().toISOString().slice(0, 10).replaceAll('-', '.');
+    return type
+      ? `${this.indexPrefix}-${type}-${date}`
+      : `${this.indexPrefix}-${date}`;
+  }
+
+  async putISMPolicy(policyId, minIndexAge) {
+    const url = `${this.baseUrl}/_plugins/_ism/policies/${policyId}`;
+    const body = JSON.stringify({
+      policy: {
+        description: `Delete sitespeed ${policyId} indices after ${minIndexAge}`,
+        default_state: 'hot',
+        states: [
+          {
+            name: 'hot',
+            actions: [],
+            transitions: [
+              {
+                state_name: 'delete',
+                conditions: { min_index_age: minIndexAge }
+              }
+            ]
+          },
+          {
+            name: 'delete',
+            actions: [{ delete: {} }],
+            transitions: []
+          }
+        ]
+      }
+    });
+
+    const headers = { 'Content-Type': 'application/json' };
+    if (this.authHeader) {
+      headers['Authorization'] = this.authHeader;
+    }
+
+    const response = await fetch(url, { method: 'PUT', headers, body });
+    if (!response.ok && response.status !== 409) {
+      const text = await response.text();
+      throw new Error(
+        `Failed to create ISM policy ${policyId} (${response.status}): ${text}`
+      );
+    }
+  }
+
+  async bulk(documents, index) {
+    if (documents.length === 0) return;
+
+    const index_ = index ?? this.indexName();
+    const body =
+      documents
+        .flatMap(doc => [
+          JSON.stringify({ index: { _index: index_ } }),
+          JSON.stringify(doc)
+        ])
+        .join('\n') + '\n';
+
+    const url = `${this.baseUrl}/_bulk`;
+    log.debug('Sending %d document(s) to OpenSearch %s', documents.length, url);
+
+    const headers = { 'Content-Type': 'application/x-ndjson' };
+    if (this.authHeader) {
+      headers['Authorization'] = this.authHeader;
+    }
+
+    const response = await fetch(url, { method: 'POST', headers, body });
+
+    if (!response.ok) {
+      const text = await response.text();
+      throw new Error(`OpenSearch bulk failed (${response.status}): ${text}`);
+    }
+
+    const result = await response.json();
+    if (result.errors) {
+      const errors = result.items
+        .filter(item => item.index?.error)
+        .map(item => item.index.error);
+      log.error('OpenSearch bulk had %d error(s): %j', errors.length, errors);
+    }
+  }
+}
diff --git a/test/docker/docker-compose.opensearch.yml b/test/docker/docker-compose.opensearch.yml
new file mode 100644
index 0000000000..04621dee99
--- /dev/null
+++ b/test/docker/docker-compose.opensearch.yml
@@ -0,0 +1,14 @@
+services:
+  opensearch:
+    image: opensearchproject/opensearch:2
+    environment:
+      - discovery.type=single-node
+      - DISABLE_SECURITY_PLUGIN=true
+      - OPENSEARCH_JAVA_OPTS=-Xms512m -Xmx512m
+    ports:
+      - "9200:9200"
+    healthcheck:
+      test: ["CMD", "curl", "-sf", "http://localhost:9200/_cluster/health"]
+      interval: 5s
+      timeout: 5s
+      retries: 20