diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index d03778e6dc..f61aa3306b 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -85,6 +85,12 @@ jobs:
         run: ./node_modules/.bin/gulp build-app
         env:
           IS_TEST: "true"
+      - name: Upload bundle stats
+        uses: actions/upload-artifact@v3.1.3
+        with:
+          name: frontend-bundle-stats
+          path: build/stats/*.json
+          if-no-files-found: error
   supervisor:
     name: Build supervisor
     needs: [lint, test]
@@ -103,3 +109,9 @@ jobs:
         run: ./node_modules/.bin/gulp build-hassio
         env:
           IS_TEST: "true"
+      - name: Upload bundle stats
+        uses: actions/upload-artifact@v3.1.3
+        with:
+          name: supervisor-bundle-stats
+          path: build/stats/*.json
+          if-no-files-found: error
diff --git a/.github/workflows/nightly.yaml b/.github/workflows/nightly.yaml
index 1316a20f7d..98d3e876fe 100644
--- a/.github/workflows/nightly.yaml
+++ b/.github/workflows/nightly.yaml
@@ -57,14 +57,14 @@ jobs:
         run: tar -czvf translations.tar.gz translations
 
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v3.1.3
         with:
           name: wheels
           path: dist/home_assistant_frontend*.whl
           if-no-files-found: error
 
       - name: Upload translations
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v3.1.3
         with:
           name: translations
           path: translations.tar.gz
diff --git a/.github/workflows/relative-ci.yaml b/.github/workflows/relative-ci.yaml
new file mode 100644
index 0000000000..3ccade78bb
--- /dev/null
+++ b/.github/workflows/relative-ci.yaml
@@ -0,0 +1,28 @@
+name: RelativeCI
+
+on:
+  workflow_run:
+    workflows: [CI]
+    types:
+      - completed
+    branches:
+      - dev
+
+jobs:
+  upload:
+    name: Upload stats
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    strategy:
+      matrix:
+        bundle: [frontend, supervisor]
+        build: [modern, legacy]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Send bundle stats and build information to RelativeCI
+        uses: relative-ci/agent-action@v2.1.8
+        with:
+          key: ${{ secrets[format('RELATIVE_CI_KEY_{1}_{2}', matrix.bundle, matrix.build)] }}
+          token: ${{ github.token }}
+          slug: ${{ format('{1}-{2}', matrix.bundle, matrix.build) }}
+          artifactName: ${{ format('{1}-bundle-stats', matrix.bundle) }}
+          artifactWebpackStatsFile: ${{ format('{1}-{2}.json', matrix.bundle, matrix.build) }}
diff --git a/build-scripts/bundle.cjs b/build-scripts/bundle.cjs
index b359a07374..aa84af365c 100644
--- a/build-scripts/bundle.cjs
+++ b/build-scripts/bundle.cjs
@@ -149,7 +149,7 @@ module.exports.babelOptions = ({ latestBuild, isProdBuild, isTestBuild }) => ({
   sourceMaps: !isTestBuild,
 });
 
-const nameSuffix = (latestBuild) => (latestBuild ? "-latest" : "-es5");
+const nameSuffix = (latestBuild) => (latestBuild ? "-modern" : "-legacy");
 
 const outputPath = (outputRoot, latestBuild) =>
   path.resolve(outputRoot, latestBuild ? "frontend_latest" : "frontend_es5");
@@ -183,7 +183,7 @@ const publicPath = (latestBuild, root = "") =>
 module.exports.config = {
   app({ isProdBuild, latestBuild, isStatsBuild, isTestBuild, isWDS }) {
     return {
-      name: "app" + nameSuffix(latestBuild),
+      name: "frontend" + nameSuffix(latestBuild),
       entry: {
         service_worker: "./src/entrypoints/service_worker.ts",
         app: "./src/entrypoints/app.ts",
diff --git a/build-scripts/webpack.cjs b/build-scripts/webpack.cjs
index 769dd58a12..5997e59d58 100644
--- a/build-scripts/webpack.cjs
+++ b/build-scripts/webpack.cjs
@@ -1,6 +1,8 @@
 const { existsSync } = require("fs");
 const path = require("path");
 const webpack = require("webpack");
+const { StatsWriterPlugin } = require("webpack-stats-plugin");
+const filterStats = require("@bundle-stats/plugin-webpack-filter").default;
 const TerserPlugin = require("terser-webpack-plugin");
 const { WebpackManifestPlugin } = require("webpack-manifest-plugin");
 const log = require("fancy-log");
@@ -152,6 +154,15 @@ const createWebpackConfig = ({
           )
         ),
       !isProdBuild && new LogStartCompilePlugin(),
+      isProdBuild &&
+        new StatsWriterPlugin({
+          filename: path.relative(
+            outputPath,
+            path.join(paths.build_dir, "stats", `${name}.json`)
+          ),
+          stats: { assets: true, chunks: true, modules: true },
+          transform: (stats) => JSON.stringify(filterStats(stats)),
+        }),
     ].filter(Boolean),
     resolve: {
       extensions: [".ts", ".js", ".json"],
diff --git a/package.json b/package.json
index 633ac8ba8c..24b209ef96 100644
--- a/package.json
+++ b/package.json
@@ -159,6 +159,7 @@
     "@babel/plugin-transform-runtime": "7.22.15",
     "@babel/preset-env": "7.22.20",
     "@babel/preset-typescript": "7.23.0",
+    "@bundle-stats/plugin-webpack-filter": "4.7.6",
     "@koa/cors": "4.0.0",
     "@lokalise/node-api": "12.0.0",
     "@octokit/auth-oauth-device": "6.0.1",
@@ -248,6 +249,7 @@
     "webpack-cli": "5.1.4",
     "webpack-dev-server": "4.15.1",
     "webpack-manifest-plugin": "5.0.0",
+    "webpack-stats-plugin": "1.1.3",
     "webpackbar": "5.0.2",
     "workbox-build": "7.0.0"
   },
diff --git a/yarn.lock b/yarn.lock
index 147f9a3f3a..19c16fe853 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1437,6 +1437,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@bundle-stats/plugin-webpack-filter@npm:4.7.6":
+  version: 4.7.6
+  resolution: "@bundle-stats/plugin-webpack-filter@npm:4.7.6"
+  peerDependencies:
+    core-js: ^3.0.0
+  checksum: a7bb72f6222dc8ec06c923d93772c2569885fbeb127d5a7df3e0c88b4f23b7ec7d92ae5525b5ede6a81b00416c8d3a18a00d7637990f51afc1fc0a284d275426
+  languageName: node
+  linkType: hard
+
 "@codemirror/autocomplete@npm:6.9.2":
   version: 6.9.2
   resolution: "@codemirror/autocomplete@npm:6.9.2"
@@ -9634,6 +9643,7 @@ __metadata:
     "@babel/preset-typescript": 7.23.0
     "@babel/runtime": 7.23.1
     "@braintree/sanitize-url": 6.0.4
+    "@bundle-stats/plugin-webpack-filter": 4.7.6
     "@codemirror/autocomplete": 6.9.2
     "@codemirror/commands": 6.3.0
     "@codemirror/language": 6.9.1
@@ -9840,6 +9850,7 @@ __metadata:
     webpack-cli: 5.1.4
     webpack-dev-server: 4.15.1
     webpack-manifest-plugin: 5.0.0
+    webpack-stats-plugin: 1.1.3
     webpackbar: 5.0.2
     weekstart: 2.0.0
     workbox-build: 7.0.0
@@ -16335,6 +16346,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"webpack-stats-plugin@npm:1.1.3":
+  version: 1.1.3
+  resolution: "webpack-stats-plugin@npm:1.1.3"
+  checksum: 9a71d329c5d55e33105abfe4c72d715a0a6ce4ab8da6faa2bc5a65953915d656cdf3c420b3fc0628b0d9859cc59c09e49f731645746739e417da531130a7a9a8
+  languageName: node
+  linkType: hard
+
 "webpack@npm:5.88.2":
   version: 5.88.2
   resolution: "webpack@npm:5.88.2"