diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 8d7c5580a80..00000000000
--- a/.travis.yml
+++ /dev/null
@@ -1,83 +0,0 @@
-language: generic
-
-matrix:
-  include:
-    - os: linux
-      sudo: required
-      env: PYTHON_VERSION=python2 ONNX_ML=0
-      language: python
-      python: "2.7"
-    - os: linux
-      sudo: required
-      env: PYTHON_VERSION=python3 ONNX_ML=0
-      language: python
-      python: "3.6"
-    - os: linux
-      sudo: required
-      env: PYTHON_VERSION=python3 ONNX_ML=0 ONNX_DEBUG=1
-      language: python
-      python: "3.6"
-    - os: linux
-      sudo: required
-      env: PYTHON_VERSION=python3 ONNX_ML=1 ONNX_DEBUG=1
-      language: python
-      python: "3.6"
-    - os: osx
-      osx_image: xcode9.3
-      env: PYTHON_VERSION=python2 ONNX_ML=0
-    - os: osx
-      osx_image: xcode9.3
-      env: PYTHON_VERSION=python3 ONNX_ML=0
-    - os: linux
-      sudo: required
-      env: PYTHON_VERSION=python2
-      language: python
-      python: "2.7"
-    - os: linux
-      sudo: required
-      env: PYTHON_VERSION=python3
-      language: python
-      python: "3.6"
-    - os: osx
-      osx_image: xcode9.3
-      env: PYTHON_VERSION=python2
-    - os: osx
-      osx_image: xcode9.3
-      env: PYTHON_VERSION=python3
-    - os: osx
-      osx_image: xcode9.3
-      env: PYTHON_VERSION=python3 ONNX_DEBUG=1
-    - os: linux
-      sudo: required
-      env: PYTHON_VERSION=python2 LITE=1
-      language: python
-      python: "2.7"
-    - os: osx
-      osx_image: xcode9.3
-      env: PYTHON_VERSION=python2 LITE=1
-
-env:
-  global:
-    - PB_VERSION=2.6.1
-
-before_install:
-  - ./.travis/before_install.sh
-
-install:
-  - ./.travis/install.sh
-
-script:
-  - ./.travis/script.sh
-
-after_success:
-  - ./.travis/after_success.sh
-
-after_failure:
-  - ./.travis/after_failure.sh
-
-cache:
-  - timeout: 300
-  - directories:
-    - $BUILD_CCACHE_DIR
-    - $HOME/.ccache
-    - $HOME/.cache/pb
diff --git a/.travis/after_failure.sh b/.travis/after_failure.sh
deleted file mode 100755
index 3a22393faf1..00000000000
--- a/.travis/after_failure.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/bash
-
-script_path=$(python -c "import os; import sys; print(os.path.realpath(sys.argv[1]))" "${BASH_SOURCE[0]}")
-source "${script_path%/*}/setup.sh"
diff --git a/.travis/after_success.sh b/.travis/after_success.sh
deleted file mode 100755
index 3a22393faf1..00000000000
--- a/.travis/after_success.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/bash
-
-script_path=$(python -c "import os; import sys; print(os.path.realpath(sys.argv[1]))" "${BASH_SOURCE[0]}")
-source "${script_path%/*}/setup.sh"
diff --git a/.travis/before_install.sh b/.travis/before_install.sh
deleted file mode 100755
index 3dad9110adb..00000000000
--- a/.travis/before_install.sh
+++ /dev/null
@@ -1,57 +0,0 @@
-#!/bin/bash
-
-# Don't source setup.sh here, because the virtualenv might not be set up yet
-
-set -o xtrace
-
-export NUMCORES=`grep -c ^processor /proc/cpuinfo`
-if [ ! -n "$NUMCORES" ]; then
-  export NUMCORES=`sysctl -n hw.ncpu`
-fi
-echo Using $NUMCORES cores
-
-# Install dependencies
-if [ "$TRAVIS_OS_NAME" == "linux" ]; then
-  sudo apt-get update
-  APT_INSTALL_CMD='sudo apt-get install -y --no-install-recommends'
-  $APT_INSTALL_CMD dos2unix
-
-  function install_protobuf() {
-      # Install protobuf
-      local pb_dir="$HOME/.cache/pb"
-      mkdir -p "$pb_dir"
-      wget -qO- "https://github.com/google/protobuf/releases/download/v${PB_VERSION}/protobuf-${PB_VERSION}.tar.gz" | tar -xz -C "$pb_dir" --strip-components 1
-      ccache -z
-      cd "$pb_dir" && ./configure && make -j${NUMCORES} && make check && sudo make install && sudo ldconfig && cd -
-      ccache -s
-  }
-
-  install_protobuf
-
-elif [ "$TRAVIS_OS_NAME" == "osx" ]; then
-  brew update
-  brew install ccache protobuf
-  if [ "${PYTHON_VERSION}" == "python3" ]; then
-    # For mypy, if you want to target the latest Python version, you will have to use that latest version to run mypy
-    # Therefore, if travis-ci need to test 3.8 in the future, it will need to install py3.8 here
-    # Simply install python@3.6.5 for now
-    brew unlink python
-    brew install --ignore-dependencies https://raw.githubusercontent.com/Homebrew/homebrew-core/f2a764ef944b1080be64bd88dca9a1d80130c558/Formula/python.rb
-  fi
-else
-  echo Unknown OS: $TRAVIS_OS_NAME
-  exit 1
-fi
-
-# TODO consider using "python3.6 -m venv"
-# which is recommended by python3.6 and may make some difference
-if [ "$TRAVIS_OS_NAME" == "osx" ]; then
-  pip install --quiet virtualenv
-  virtualenv -p "${PYTHON_VERSION}" "${HOME}/virtualenv"
-  source "${HOME}/virtualenv/bin/activate"
-fi
-
-# Update all existing python packages
-pip install --quiet -U pip setuptools
-
-pip list --outdated --format=freeze | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 pip install -U --quiet
diff --git a/.travis/install.sh b/.travis/install.sh
deleted file mode 100755
index edfc75db787..00000000000
--- a/.travis/install.sh
+++ /dev/null
@@ -1,21 +0,0 @@
-#!/bin/bash
-
-script_path=$(python -c "import os; import sys; print(os.path.realpath(sys.argv[1]))" "${BASH_SOURCE[0]}")
-source "${script_path%/*}/setup.sh"
-
-export ONNX_BUILD_TESTS=1
-pip install --quiet protobuf numpy
-
-export CMAKE_ARGS="-DONNX_WERROR=ON"
-if [[ -n "USE_LITE_PROTO" ]]; then
-    export CMAKE_ARGS="${CMAKE_ARGS} -DONNX_USE_LITE_PROTO=ON"
-fi
-export CMAKE_ARGS="${CMAKE_ARGS} -DONNXIFI_DUMMY_BACKEND=ON"
-export ONNX_NAMESPACE=ONNX_NAMESPACE_FOO_BAR_FOR_CI
-
-if [ "${ONNX_DEBUG}" == "1" ]; then
-  export DEBUG=1
-fi
-
-time python setup.py --quiet bdist_wheel --universal --dist-dir .
-find . -maxdepth 1 -name "*.whl" -ls -exec pip install {} \;
diff --git a/.travis/script.sh b/.travis/script.sh
deleted file mode 100755
index 03ddaa48b45..00000000000
--- a/.travis/script.sh
+++ /dev/null
@@ -1,58 +0,0 @@
-#!/bin/bash
-
-script_path=$(python -c "import os; import sys; print(os.path.realpath(sys.argv[1]))" "${BASH_SOURCE[0]}")
-source "${script_path%/*}/setup.sh"
-
-# onnx c++ API tests
-export LD_LIBRARY_PATH="${top_dir}/.setuptools-cmake-build/:$LD_LIBRARY_PATH"
-# do not use find -exec here, it would ignore the segement fault of gtest.
-./.setuptools-cmake-build/onnx_gtests
-./.setuptools-cmake-build/onnxifi_test_driver_gtests onnx/backend/test/data/node
-
-# onnx python API tests
-if [ "${PYTHON_VERSION}" == "python2" ]; then
-  pip install --quiet pytest nbval
-else
-  # pytest 6.0 made deprecation warnings fail by default, pinning pytest to 5.4.3.
-  # TODO replace deprecated function with the suggested one. https://docs.pytest.org/en/stable/deprecations.html#id5
-  pip install --quiet pytest==5.4.3 nbval
-fi
-
-pytest
-
-# lint python code
-pip install --quiet flake8
-flake8
-
-# Mypy only works with Python 3
-if [ "${PYTHON_VERSION}" != "python2" ]; then
-  # Mypy only works with our generated _pb.py files when we install in develop mode, so let's do that
-  pip uninstall -y onnx
-  time ONNX_NAMESPACE=ONNX_NAMESPACE_FOO_BAR_FOR_CI pip install --no-use-pep517 -e .[mypy]
-
-  time python setup.py --quiet typecheck
-
-  pip uninstall -y onnx
-  rm -rf .setuptools-cmake-build
-  time ONNX_NAMESPACE=ONNX_NAMESPACE_FOO_BAR_FOR_CI pip install .
-fi
-
-# check line endings to be UNIX
-find . -type f -regextype posix-extended -regex '.*\.(py|cpp|md|h|cc|proto|proto3|in)' | xargs dos2unix --quiet
-git status
-git diff --exit-code
-
-# check auto-gen files up-to-date
-python onnx/defs/gen_doc.py
-python onnx/gen_proto.py -l
-python onnx/gen_proto.py -l --ml
-python onnx/backend/test/stat_coverage.py
-backend-test-tools generate-data
-git status
-git diff --exit-code  -- . ':(exclude)onnx/onnx-data.proto' ':(exclude)onnx/onnx-data.proto3'
-
-# Do not hardcode onnx's namespace in the c++ source code, so that
-# other libraries who statically link with onnx can hide onnx symbols
-# in a private namespace.
-! grep -R --include='*.cc' --include='*.h' 'namespace onnx' .
-! grep -R --include='*.cc' --include='*.h' 'onnx::' .
diff --git a/.travis/setup.sh b/.travis/setup.sh
deleted file mode 100644
index 0306ad5b7fc..00000000000
--- a/.travis/setup.sh
+++ /dev/null
@@ -1,18 +0,0 @@
-set -ex
-
-export top_dir=$(dirname ${0%/*})
-
-if  [ "$TRAVIS_OS_NAME" == "osx" ]; then
-  source "${HOME}/virtualenv/bin/activate"
-fi
-
-# setup ccache
-if [ "$TRAVIS_OS_NAME" == "linux" ]; then
-  export PATH="/usr/lib/ccache:$PATH"
-elif [ "$TRAVIS_OS_NAME" == "osx" ]; then
-  export PATH="/usr/local/opt/ccache/libexec:$PATH"
-else
-  echo Unknown OS: $TRAVIS_OS_NAME
-  exit 1
-fi
-ccache --max-size 1G