diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index a3fdc01..f8cd67e 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -1,5 +1,6 @@
 name: Build
 on:
+  pull_request: {}
   push:
     branches: [main]
 env:
diff --git a/.github/workflows/netlify-main.yaml b/.github/workflows/netlify-main.yaml
index f281a04..ad1f3cd 100644
--- a/.github/workflows/netlify-main.yaml
+++ b/.github/workflows/netlify-main.yaml
@@ -4,6 +4,8 @@ on:
     workflows: ["Build"]
     types:
       - completed
+    branches:
+      - "main"
 
 jobs:
   deploy:
diff --git a/.github/workflows/netlify-pr.yaml b/.github/workflows/netlify-pr.yaml
new file mode 100644
index 0000000..1eb4ab2
--- /dev/null
+++ b/.github/workflows/netlify-pr.yaml
@@ -0,0 +1,79 @@
+name: Netlify PR Preview
+on:
+  workflow_run:
+    workflows: ["Build"]
+    types:
+      - completed
+    branches-ignore:
+      - "main"
+jobs:
+  deploy:
+    if: github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'pull_request'
+    runs-on: ubuntu-latest
+    permissions:
+      deployments: write
+    environment: Netlify
+    steps:
+      - name: 📝 Create Deployment
+        uses: bobheadxi/deployments@v1
+        id: deployment
+        with:
+          step: start
+          token: ${{ secrets.GITHUB_TOKEN }}
+          env: Netlify
+          ref: ${{ github.event.workflow_run.head_sha }}
+          desc: |
+            Do you trust the author of this PR? Maybe this build will steal your keys or give you malware.
+            Exercise caution. Use test accounts.
+
+      - id: prdetails
+        uses: matrix-org/pr-details-action@v1.2
+        with:
+          owner: ${{ github.event.workflow_run.head_repository.owner.login }}
+          branch: ${{ github.event.workflow_run.head_branch }}
+
+      # There's a 'download artifact' action, but it hasn't been updated for the workflow_run action
+      # (https://github.com/actions/download-artifact/issues/60) so instead we get this mess:
+      - name: 📥 Download artifact
+        uses: dawidd6/action-download-artifact@v2
+        with:
+          run_id: ${{ github.event.workflow_run.id }}
+          name: build
+          path: webapp
+
+      - name: Add redirects file
+        # We fetch from github directly as we don't bother checking out the repo
+        run: curl -s https://raw.githubusercontent.com/vector-im/element-call/main/config/netlify_redirects > webapp/_redirects
+
+      - name: Add config file
+        run: curl -s https://raw.githubusercontent.com/vector-im/element-call/main/config/element_io_preview.json > webapp/config.json
+
+      - name: ☁️ Deploy to Netlify
+        id: netlify
+        uses: nwtgck/actions-netlify@v1.2
+        with:
+          publish-dir: webapp
+          deploy-message: "Deploy from GitHub Actions"
+          # These don't work because we're in workflow_run
+          enable-pull-request-comment: false
+          enable-commit-comment: false
+          alias: pr${{ steps.prdetails.outputs.pr_id }}
+        env:
+          NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
+          NETLIFY_SITE_ID: ${{ secrets.NETLIFY_SITE_ID }}
+        timeout-minutes: 1
+
+      - name: 🚦 Update deployment status
+        uses: bobheadxi/deployments@v1
+        if: always()
+        with:
+          step: finish
+          override: false
+          token: ${{ secrets.GITHUB_TOKEN }}
+          status: ${{ job.status }}
+          env: ${{ steps.deployment.outputs.env }}
+          deployment_id: ${{ steps.deployment.outputs.deployment_id }}
+          env_url: ${{ steps.netlify.outputs.deploy-url }}
+          desc: |
+            Do you trust the author of this PR? Maybe this build will steal your keys or give you malware.
+            Exercise caution. Use test accounts.
diff --git a/config/element_io_preview.json b/config/element_io_preview.json
new file mode 100644
index 0000000..7afb8f6
--- /dev/null
+++ b/config/element_io_preview.json
@@ -0,0 +1,8 @@
+{
+  "default_server_config": {
+    "m.homeserver": {
+      "base_url": "https://call.ems.host",
+      "server_name": "call.ems.host"
+    }
+  }
+}