diff --git a/.github/workflows/mlc.yml b/.github/workflows/mlc.yml
new file mode 100644
index 0000000000..d6bbfc2b76
--- /dev/null
+++ b/.github/workflows/mlc.yml
@@ -0,0 +1,98 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+# GH actions.
+# We use it to cover windows and mac builds
+# Jenkins is still the primary CI
+
+name: CI
+
+on:
+  push:
+    branches:
+      - mlc
+  pull_request:
+    branches:
+      - mlc
+  workflow_dispatch:
+
+concurrency:
+  group: CI-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  MacOS:
+    if: ${{ github.repository == 'mlc-ai/relax' }}
+    runs-on: macOS-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
+      - name: Set up environment
+        uses: ./.github/actions/setup
+      - name: Conda Build
+        shell: bash -l {0}
+        run: >-
+          conda build --output-folder=conda/pkg  conda/recipe &&
+          conda install tvm -c ./conda/pkg
+      - name: Build iOS RPC
+        run: |
+          IOS_VERSION="14.0"
+          CMAKE_FLAGS="-DCMAKE_BUILD_TYPE=Release \
+                       -DCMAKE_SYSTEM_NAME=iOS \
+                       -DCMAKE_SYSTEM_VERSION=${IOS_VERSION} \
+                       -DCMAKE_OSX_SYSROOT=iphonesimulator \
+                       -DCMAKE_OSX_ARCHITECTURES=x86_64 \
+                       -DCMAKE_OSX_DEPLOYMENT_TARGET=14.0 \
+                       -DCMAKE_BUILD_WITH_INSTALL_NAME_DIR=ON \
+                       -DUSE_IOS_RPC=ON"
+
+          mkdir build-ios-simulator
+          cd build-ios-simulator
+          cmake .. ${CMAKE_FLAGS}
+          cmake --build . --target ios_rpc
+      - name: Test
+        shell: bash -l {0}
+        run: >-
+          python -m pytest -v tests/python/all-platform-minimal-test
+      - name: Test iOS RPC
+        shell: bash -l {0}
+        run: >-
+          python -m pip install tornado psutil cloudpickle &&
+          export PYTHONPATH=tests/python/contrib:${PYTHONPATH} &&
+          export BUNDLE_ID=org.apache.tvmrpc &&
+          export BUNDLE_PATH=build-ios-simulator/apps/ios_rpc/ios_rpc/src/ios_rpc-build/Release-iphonesimulator/tvmrpc.app &&
+          python -m pytest -v tests/python/contrib/test_rpc_server_device.py
+
+  Windows:
+    if: ${{ github.repository == 'mlc-ai/relax' }}
+    runs-on: windows-2019
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
+      - name: Set up environment
+        uses: ./.github/actions/setup
+      - name: Conda Build
+        shell: cmd /C call {0}
+        run: >-
+          conda build --output-folder=conda/pkg conda/recipe &&
+          conda install tvm -c ./conda/pkg
+      - name: Test
+        shell: cmd /C call {0}
+        run: >-
+          python -m pytest -v tests/python/all-platform-minimal-test