diff --git a/.circleci/config.yml b/.circleci/config.yml
index e9447fc62..923474f84 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -14,7 +14,9 @@ jobs:
           command: sudo apt-get update
       - run:
           name: Install dependencies
-          command: sudo apt-get install -y cmake libqt5svg5 libqt5svg5-dev neovim python3-dev python3-jinja2 python3-msgpack python3-pip qt5-default
+          command: |
+            sudo apt-get install -y cmake libqt5svg5 libqt5svg5-dev neovim python3-dev python3-jinja2 python3-msgpack python3-pip qt5-default
+            pip install --user cpp-coveralls PyYAML
       - run:
           name: build
           command: |
@@ -29,4 +31,9 @@ jobs:
           command: |
             cd build
             ctest -VV
+      - run:
+          name: Upload coverage report
+          # trick cpp-coveralls into doing the right thing
+          # https://github.com/eddyxu/cpp-coveralls/issues/143
+          command: TRAVIS_JOB_ID="#${CIRCLE_BUILD_NUM}" ~/.local/bin/cpp-coveralls -y contrib/coveralls-circle.yml -E '.*/build/.*' -E '.*/third-party/.*' -E '.*/test/.*' -E '.*/bindings/.*'
 
diff --git a/.travis.yml b/.travis.yml
index 3b1c5e74f..9346d57ab 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,10 +12,16 @@ before_install:
   - brew ls | grep -wq cmake || brew install cmake
   - brew ls | grep -wq qt5 || brew install qt5
   - brew ls | grep -wq msgpack || brew install msgpack
+  # cpp-coveralls https://github.com/eddyxu/cpp-coveralls
+  - pip install cpp-coveralls PyYAML
 script:
   - mkdir build
   - cd build
-  - cmake -DUSE_SYSTEM_MSGPACK=OFF ..
+  - cmake -DUSE_SYSTEM_MSGPACK=OFF -DUSE_GCOV=ON ..
   - make
   - nvim --version
   - ctest --output-on-failure
+#after_success:
+#  # collect coverage
+#  - cd $TRAVIS_BUILD_DIR
+#  - coveralls -y contrib/coveralls-travis.yml -E '.*/build/.*' -E '.*/third-party/.*' -E '.*/test/.*' -E '.*/bindings/.*'
diff --git a/contrib/coveralls-circle.yml b/contrib/coveralls-circle.yml
new file mode 100644
index 000000000..4bec845a3
--- /dev/null
+++ b/contrib/coveralls-circle.yml
@@ -0,0 +1,8 @@
+gcov_options: '\-lp'
+root: '.'
+build_root: 'build'
+service_name: 'circle-ci'
+# Do not set exclude rules as they skip running gcov entirely
+# which is too broad https://github.com/eddyxu/cpp-coveralls/issues/145#issuecomment-521623753
+# instead check the travis recipe for post filters
+#exclude: ['test', 'build', 'third-party']
diff --git a/contrib/coveralls-travis.yml b/contrib/coveralls-travis.yml
new file mode 100644
index 000000000..e4848b29f
--- /dev/null
+++ b/contrib/coveralls-travis.yml
@@ -0,0 +1,8 @@
+gcov_options: '\-lp'
+root: '.'
+build_root: 'build'
+service_name: 'travis-ci'
+# Do not set exclude rules as they skip running gcov entirely
+# which is too broad https://github.com/eddyxu/cpp-coveralls/issues/145#issuecomment-521623753
+# instead check the travis recipe for post filters
+#exclude: ['test', 'build', 'third-party']