diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..e45e7b1
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,94 @@
+name: CI
+on: [push, pull_request]
+
+jobs:
+  # Here we're keeping on arbitrary LLVM version fixed and varying GCC.
+  linux-gcc:
+    strategy:
+      fail-fast: false
+      matrix:
+        image:
+          # List: https://github.com/conan-io/conan-docker-tools
+          - gcc10
+          - gcc9
+          - gcc8
+          - gcc7
+          - gcc6
+
+    runs-on: ubuntu-latest
+    container:
+      image: conanio/${{matrix.image}}
+      options: --user root
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Create Build Environment
+      run: cmake -E make_directory build
+    - name: Install libclang
+      run: apt-get -qq update && apt-get install -y llvm clang libclang-dev
+    - name: Install ninja
+      run: type ninja || apt-get install -y ninja-build
+
+    - name: Configure
+      working-directory: build/
+      run: cmake -GNinja $GITHUB_WORKSPACE
+    - name: Build
+      working-directory: build/
+      run: cmake --build .
+    - name: Test
+      working-directory: build/
+      run: ctest --output-on-failure
+
+  # Here we're varying the LLVM version and using its clang for compiling as well.
+  linux-clang:
+    strategy:
+      fail-fast: false
+      matrix:
+        version: [7, 8, 9, 10]
+
+    runs-on: ubuntu-latest
+    container:
+      # Just one of the newer images.
+      image: conanio/gcc10
+      options: --user root
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Create Build Environment
+      run: cmake -E make_directory build
+    - name: Install libclang
+      run: apt-get -qq update && apt-get install -y llvm-${{matrix.version}} clang-${{matrix.version}} libclang-${{matrix.version}}-dev
+    - name: Install ninja
+      run: type ninja || apt-get install -y ninja-build
+
+    - name: Configure
+      working-directory: build/
+      run: cmake -GNinja $GITHUB_WORKSPACE -DCMAKE_CXX_COMPILER=clang++-${{matrix.version}}
+    - name: Build
+      working-directory: build/
+      run: cmake --build .
+    - name: Test
+      working-directory: build/
+      run: ctest --output-on-failure
+
+  macos:
+    runs-on: macos-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Create Build Environment
+      run: cmake -E make_directory build
+    - name: Install ninja
+      run: brew install ninja
+
+    - name: Configure
+      working-directory: build/
+      run: cmake -GNinja $GITHUB_WORKSPACE -DLLVM_CONFIG_BINARY="/usr/local/opt/llvm/bin/llvm-config"
+    - name: Build
+      working-directory: build/
+      run: cmake --build .
+    - name: Test
+      working-directory: build/
+      run: ctest --output-on-failure
+
+
diff --git a/README.md b/README.md
index 736196e..1f9d709 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,5 @@
 # cppast
 
-[![Build Status](https://dev.azure.com/foonathan/cppast/_apis/build/status/foonathan.cppast?branchName=master)](https://dev.azure.com/foonathan/cppast/_build/latest?definitionId=7&branchName=master)
-[![Build status](https://ci.appveyor.com/api/projects/status/8gp5btjq7eassvn7?svg=true)](https://ci.appveyor.com/project/foonathan/cppast)
-
 Library interface to the C++ AST — parse source files, synthesize entities, get documentation comments and generate code.
 
 > |[![](https://www.jonathanmueller.dev/embarcadero-logo.png)](https://www.embarcadero.com/de/products/cbuilder/starter) | Sponsored by [Embarcadero C++Builder](https://www.embarcadero.com/de/products/cbuilder/starter). |
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 3db0470..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-version: '{build}'
-build_script:
-  - cmd: mkdir build\ && cd build\
-  - cmd: call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat" x64
-  - cmd: clang++ --version
-  - cmd: cmake -G"Visual Studio 14 2015 Win64" -DLLVM_VERSION_EXPLICIT=4.0.0 -DLIBCLANG_LIBRARY="C:/Program Files/LLVM/lib/libclang.lib" -DLIBCLANG_INCLUDE_DIR="C:/Program Files/LLVM/include" -DCLANG_BINARY="C:/Program Files/LLVM/bin/clang++.exe" ../
-
-  - cmd: cmake --build . -- /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll" /verbosity:minimal
-
-test_script:
-  - cmd: test\Debug\cppast_test.exe * ~cppast
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
deleted file mode 100644
index 88458e3..0000000
--- a/azure-pipelines.yml
+++ /dev/null
@@ -1,68 +0,0 @@
-name: 'CI build'
-trigger:
-  branches:
-    include:
-      - master
-      - feature/*
-  paths:
-    exclude:
-      - README.md
-
-jobs:
-  - job: compiler_linux
-    pool:
-      vmImage: 'Ubuntu 16.04'
-    strategy:
-      matrix:
-        GCC5:
-          IMAGE: 'conanio/gcc5'
-        GCC6:
-          IMAGE: 'conanio/gcc6'
-        GCC7:
-          IMAGE: 'conanio/gcc7'
-        GCC8:
-          IMAGE: 'conanio/gcc8'
-    steps:
-      - script: docker run --privileged -u root -v "$PWD:/cppast" $(IMAGE) bash -c "apt-get -qq update && apt-get -qq install -y --no-install-recommends llvm-4.0-dev clang-4.0 libclang-4.0-dev && cmake /cppast/ && cmake --build . && ctest --output-on-failure -R test"
-        displayName: "Compiling using $(IMAGE)"
-
-  - job: llvm_linux
-    pool:
-      vmImage: 'Ubuntu 16.04'
-    strategy:
-      matrix:
-        LLVM4:
-          IMAGE: 'foonathan/micro_cpp_llvm:llvm4'
-        LLVM5:
-          IMAGE: 'foonathan/micro_cpp_llvm:llvm5'
-        LLVM6:
-          IMAGE: 'foonathan/micro_cpp_llvm:llvm6'
-        LLVM7:
-          IMAGE: 'foonathan/micro_cpp_llvm:llvm7'
-        LLVM8:
-          IMAGE: 'foonathan/micro_cpp_llvm:llvm8'
-    steps:
-      - script: docker run -u root -v "$PWD:/cppast" $(IMAGE) bash -c "cmake -DCMAKE_CXX_COMPILER=clang++ /cppast/ && cmake --build . && ctest --output-on-failure -R test"
-        displayName: "Compiling using $(IMAGE)"
-
-  - job: llvm_macos
-    pool:
-      vmImage: 'macOS-10.14'
-    strategy:
-      matrix:
-        LLVM4:
-          URL: 'http://releases.llvm.org/4.0.0/clang+llvm-4.0.0-x86_64-apple-darwin.tar.xz'
-          EXCLUDE: 'integration'
-        LLVM5:
-          URL: 'http://releases.llvm.org/5.0.2/clang+llvm-5.0.2-x86_64-apple-darwin.tar.xz'
-        LLVM6:
-          URL: 'http://releases.llvm.org/6.0.0/clang+llvm-6.0.0-x86_64-apple-darwin.tar.xz'
-        LLVM7:
-          URL: 'http://releases.llvm.org/7.0.0/clang+llvm-7.0.0-x86_64-apple-darwin.tar.xz'
-        LLVM8:
-          URL: 'http://releases.llvm.org/8.0.0/clang+llvm-8.0.0-x86_64-apple-darwin.tar.xz'
-    steps:
-      - script: |
-          mkdir build && cd build/
-          cmake -DLLVM_DOWNLOAD_URL=$URL ../ && cmake --build . && ctest --output-on-failure -R test -E $EXCLUDE
-        displayName: "Compiling using $(URL)"