diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 00000000000..19c08182b67
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,124 @@
+name: CI
+on:
+  push:
+    branches-ignore: [master]
+  pull_request:
+    branches: ['*']
+
+defaults:
+  run:
+    shell: bash
+
+jobs:
+  # Check Code style quickly by running `rustfmt` over all code
+  rustfmt:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: rustup update stable && rustup default stable
+    - run: rustup component add rustfmt
+    - run: cargo fmt --all -- --check
+    - run: cd crates/cargo-test-macro && cargo fmt --all -- --check
+    - run: cd crates/cargo-test-support && cargo fmt --all -- --check
+    - run: cd crates/crates-io && cargo fmt --all -- --check
+    - run: cd crates/resolver-tests && cargo fmt --all -- --check
+    - run: cd crates/cargo-platform && cargo fmt --all -- --check
+
+  test:
+    runs-on: ${{ matrix.os }}
+    env:
+      CARGO_PROFILE_DEV_DEBUG: 1
+      CARGO_PROFILE_TEST_DEBUG: 1
+      CARGO_INCREMENTAL: 0
+    strategy:
+      matrix:
+        include:
+        - os: ubuntu-latest
+          rust: stable
+          other: i686-unknown-linux-gnu
+        - os: ubuntu-latest
+          rust: beta
+          other: i686-unknown-linux-gnu
+        - os: ubuntu-latest
+          rust: nightly
+          other: i686-unknown-linux-gnu
+        - os: macos-latest
+          rust: stable
+          other: x86_64-apple-ios
+        - os: windows-latest
+          rust: stable-msvc
+          other: i686-pc-windows-msvc
+        - os: windows-latest
+          rust: nightly-gnu
+          other: i686-pc-windows-gnu
+    steps:
+    - uses: actions/checkout@v2
+    - run: rustup update --no-self-update ${{ matrix.rust }} && rustup default ${{ matrix.rust }}
+    - run: rustup target add ${{ matrix.other }}
+    - run: rustup component add rustc-dev llvm-tools-preview rust-docs
+      if: startsWith(matrix.rust, 'nightly')
+    - run: sudo apt update -y && sudo apt install gcc-multilib -y
+      if: matrix.os == 'ubuntu-latest'
+    - run: rustup component add rustfmt || echo "rustfmt not available"
+
+    # Deny warnings on CI to avoid warnings getting into the codebase, and note
+    # the `force-system-lib-on-osx` which is intended to fix compile issues on
+    # OSX where compiling curl from source on OSX yields linker errors on Azure.
+    #
+    # Note that the curl issue is traced back to alexcrichton/curl-rust#279
+    # where it looks like the OSX version we're actually running on is such that
+    # a symbol is emitted that's never worked. For now force the system library
+    # to be used to fix the link errors.
+    - run: cargo test --features 'deny-warnings curl/force-system-lib-on-osx'
+    - run: cargo test -p cargo-test-support
+    - run: cargo test -p cargo-platform
+
+  resolver:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: rustup update stable && rustup default stable
+    - run: cargo test --manifest-path crates/resolver-tests/Cargo.toml
+
+  build_std:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: rustup update nightly && rustup default nightly
+    - run: rustup component add rust-src
+    - run: cargo build
+    - run: cargo test --test build-std
+      env:
+        CARGO_RUN_BUILD_STD_TESTS: 1
+  docs:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: rustup update nightly && rustup default nightly
+    - run: rustup component add rust-docs
+    - run: |
+        mkdir mdbook
+        curl -Lf https://github.com/rust-lang/mdBook/releases/download/v0.3.7/mdbook-v0.3.7-x86_64-unknown-linux-gnu.tar.gz | tar -xz --directory=./mdbook
+        echo ::add-path::`pwd`/mdbook
+    - run: cargo doc --no-deps
+    - run: cd src/doc && mdbook build --dest-dir ../../target/doc
+    - run: |
+        cd src/doc
+        curl -sSLo linkcheck.sh \
+          https://raw.githubusercontent.com/rust-lang/rust/master/src/tools/linkchecker/linkcheck.sh
+        sh linkcheck.sh --all cargo
+
+  success:
+    name: bors build finished
+    needs: [docs, rustfmt, test, resolver, build_std]
+    runs-on: ubuntu-latest
+    if: "success() && github.event_name == 'push' && github.ref == 'refs/heads/auto-cargo'"
+    steps:
+    - run: echo ok
+  failure:
+    name: bors build finished
+    needs: [docs, rustfmt, test, resolver, build_std]
+    runs-on: ubuntu-latest
+    if: "!success() && github.event_name == 'push' && github.ref == 'refs/heads/auto-cargo'"
+    steps:
+    - run: exit 1
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
deleted file mode 100644
index fdd3141b5f3..00000000000
--- a/azure-pipelines.yml
+++ /dev/null
@@ -1,118 +0,0 @@
-trigger:
-  branches:
-    include:
-    - '*'
-    exclude:
-    - master
-
-jobs:
-- job: Linux
-  pool:
-    vmImage: ubuntu-16.04
-  steps:
-    - template: ci/azure-test-all.yml
-  strategy:
-    matrix:
-      stable:
-        TOOLCHAIN: stable
-      beta:
-        TOOLCHAIN: beta
-      nightly:
-        TOOLCHAIN: nightly
-  variables:
-    OTHER_TARGET: i686-unknown-linux-gnu
-
-- job: macOS
-  pool:
-    vmImage: macos-10.15
-  steps:
-    - template: ci/azure-test-all.yml
-  variables:
-    TOOLCHAIN: stable
-    OTHER_TARGET: x86_64-apple-ios
-
-- job: Windows
-  pool:
-    vmImage: windows-2019
-  steps:
-    - template: ci/azure-test-all.yml
-  strategy:
-    matrix:
-      x86_64-msvc:
-        TOOLCHAIN: stable-x86_64-pc-windows-msvc
-        OTHER_TARGET: i686-pc-windows-msvc
-      x86_64-gnu:
-        TOOLCHAIN: nightly-x86_64-pc-windows-gnu
-        OTHER_TARGET: i686-pc-windows-gnu
-
-- job: rustfmt
-  pool:
-    vmImage: ubuntu-16.04
-  steps:
-    - template: ci/azure-install-rust.yml
-    - bash: rustup component add rustfmt
-      displayName: "Install rustfmt"
-    - bash: cargo fmt --all -- --check
-      displayName: "Check rustfmt (cargo)"
-    - bash: cd crates/cargo-test-macro && cargo fmt --all -- --check
-      displayName: "Check rustfmt (cargo-test-macro)"
-    - bash: cd crates/cargo-test-support && cargo fmt --all -- --check
-      displayName: "Check rustfmt (cargo-test-support)"
-    - bash: cd crates/crates-io && cargo fmt --all -- --check
-      displayName: "Check rustfmt (crates-io)"
-    - bash: cd crates/resolver-tests && cargo fmt --all -- --check
-      displayName: "Check rustfmt (resolver-tests)"
-    - bash: cd crates/cargo-platform && cargo fmt --all -- --check
-      displayName: "Check rustfmt (cargo-platform)"
-  variables:
-    TOOLCHAIN: stable
-
-- job: resolver
-  pool:
-    vmImage: ubuntu-16.04
-  steps:
-    - template: ci/azure-install-rust.yml
-    - bash: cargo test --manifest-path crates/resolver-tests/Cargo.toml
-      displayName: "Resolver tests"
-  variables:
-    TOOLCHAIN: stable
-
-- job: build_std
-  pool:
-    vmImage: ubuntu-16.04
-  steps:
-    - template: ci/azure-install-rust.yml
-    - bash: rustup component add rust-src
-      displayName: "Install rust-src"
-    - bash: cargo build
-    - bash: cargo test --test build-std
-      displayName: "tests"
-  variables:
-    TOOLCHAIN: nightly
-    CARGO_RUN_BUILD_STD_TESTS: 1
-
-- job: docs
-  pool:
-    vmImage: ubuntu-16.04
-  variables:
-    TOOLCHAIN: nightly
-  steps:
-    - template: ci/azure-install-rust.yml
-    - bash: |
-        set -e
-        mkdir mdbook
-        curl -Lf https://github.com/rust-lang/mdBook/releases/download/v0.3.7/mdbook-v0.3.7-x86_64-unknown-linux-gnu.tar.gz | tar -xz --directory=./mdbook
-        echo "##vso[task.prependpath]`pwd`/mdbook"
-      displayName: "Install mdbook"
-    - bash: cargo doc --no-deps
-      displayName: "Build documentation"
-    - bash: cd src/doc && mdbook build --dest-dir ../../target/doc
-      displayName: "Build mdbook documentation"
-    - bash: |
-        set -e
-        rustup component add rust-docs
-        cd src/doc
-        curl -sSLo linkcheck.sh \
-          https://raw.githubusercontent.com/rust-lang/rust/master/src/tools/linkchecker/linkcheck.sh
-        sh linkcheck.sh --all cargo
-      displayName: "Check for broken links"
diff --git a/ci/azure-install-rust.yml b/ci/azure-install-rust.yml
deleted file mode 100644
index 6f26e42f4d9..00000000000
--- a/ci/azure-install-rust.yml
+++ /dev/null
@@ -1,18 +0,0 @@
-steps:
-  - bash: |
-      set -e
-      rustup set profile minimal
-      rustup component remove --toolchain=$TOOLCHAIN rust-docs || echo "already removed"
-      rustup update --no-self-update $TOOLCHAIN
-      if [[ "$TOOLCHAIN" == "nightly"* ]]; then
-        rustup component add --toolchain=$TOOLCHAIN rustc-dev llvm-tools-preview rust-docs
-      fi
-      rustup default $TOOLCHAIN
-    displayName: Install rust
-
-  - bash: |
-      set -ex
-      rustup -V
-      rustc -Vv
-      cargo -V
-    displayName: Query rust and cargo versions
diff --git a/ci/azure-test-all.yml b/ci/azure-test-all.yml
deleted file mode 100644
index feb945ca215..00000000000
--- a/ci/azure-test-all.yml
+++ /dev/null
@@ -1,33 +0,0 @@
-steps:
-- checkout: self
-  fetchDepth: 1
-
-- template: azure-install-rust.yml
-
-- bash: rustup target add $OTHER_TARGET
-  displayName: "Install cross-compile target"
-
-- bash: sudo apt update -y && sudo apt install gcc-multilib -y
-  displayName: "Install gcc-multilib (linux)"
-  condition: and(succeeded(), eq(variables['Agent.OS'], 'Linux'))
-
-# Some tests also rely on rustfmt
-- bash: rustup component add rustfmt || echo "rustfmt not available"
-  displayName: "Install rustfmt (maybe)"
-
-# Deny warnings on CI to avoid warnings getting into the codebase, and note the
-# `force-system-lib-on-osx` which is intended to fix compile issues on OSX where
-# compiling curl from source on OSX yields linker errors on Azure.
-#
-# Note that the curl issue is traced back to alexcrichton/curl-rust#279 where it
-# looks like the OSX version we're actually running on is such that a symbol is
-# emitted that's never worked. For now force the system library to be used to
-# fix the link errors.
-- bash: cargo test --features 'deny-warnings curl/force-system-lib-on-osx'
-  displayName: "cargo test"
-
-- bash: cargo test -p cargo-test-support
-  displayName: "cargo test -p cargo-test-support"
-
-- bash: cargo test -p cargo-platform
-  displayName: "cargo test -p cargo-platform"