diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7a91be5dc9..e0b60c7eec 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,10 @@ on:
 
 jobs:
   lint:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
@@ -21,7 +24,10 @@ jobs:
         run: yarn lint
 
   tests:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
@@ -35,12 +41,16 @@ jobs:
         run: yarn test --coverage --logHeapUsage -w=4 --workerIdleMemoryLimit=1.5G
 
       - name: Upload coverage to Codecov
+        if: matrix.os == 'ubuntu-latest'
         uses: codecov/codecov-action@v5
         with:
           fail_ci_if_error: false
 
   build-prod:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
@@ -55,7 +65,10 @@ jobs:
         run: yarn build-symbolicator-cli:quiet
 
   licence-check:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
@@ -67,7 +80,10 @@ jobs:
         run: yarn license-check
 
   typecheck:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
@@ -79,7 +95,10 @@ jobs:
         run: yarn ts
 
   alex:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
@@ -91,7 +110,10 @@ jobs:
         run: yarn test-alex
 
   yarn-lock:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
     steps:
       - name: Checkout code
         uses: actions/checkout@v5
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index a9021d7b33..0000000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,37 +0,0 @@
-image: Visual Studio 2022
-clone_depth: 5
-environment:
-  nodejs_version: '22.14'
-platform: x64 # flow needs 64b platforms
-
-branches:
-  only:
-    - main
-    - production
-
-# Install scripts. (runs after repo cloning)
-install:
-  # 1. Select the right node
-  # The following command works by fully reinstalling a version of node. It's a
-  # lot slower than the other command. This needs the full version (eg: 18.12)
-  - ps: Update-NodeJsInstallation (Get-NodeJsLatestBuild $env:nodejs_version) $env:platform
-  # Use the following command if the wanted version is already part of
-  # appveyor's windows machines, see https://www.appveyor.com/docs/windows-images-software/#node-js
-  # This needs the major version only (eg: 18)
-  # - ps: Install-Product node $env:nodejs_version $env:platform
-  # 2. Setup the project
-  - yarn install --frozen-lockfile
-
-# Post-install test scripts.
-test_script:
-  # Output useful info for debugging.
-  - yarn versions
-  # run tests
-  - yarn test-all
-  - yarn build-prod:quiet
-
-cache:
-  - node_modules
-
-# Don't actually build.
-build: off