Coveralls
Detect code that isn't covered by your test suite
Coveralls launched on February 2, 2018 with 83 votes, #521 of 2,635 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 8 years on.
What it does
Coveralls helps you deliver code confidently by showing which parts of your code aren’t covered by your test suite.
Measure, track and drive improvement in code coverage across your engineering organization. Works with any CI service. Always free for open source. COVERALLS!
We help you deliver code confidently by showing which parts of your code aren’t covered by tests. Free for open source repos. Pro accounts for private repos. Instant sign-in with GitHub, Bitbucket, or GitLab. “Coveralls has been an extremely valuable tool for helping us gain insight into our testing suite health beyond the binary red or green metric. We won’t merge a PR without it!” - Marc Campbell (Co-Founder and CTO Replicated) Figuring out where your tests are lacking can be painful. You're already running your tests on a continuous integration server, so shouldn't it be doing the heavy lifting? Coveralls works with your CI server and sifts through your coverage data to find issues you…from coveralls.io
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Coveralls.io, track test coverage history, and badge your repos2013 · coveralls.io · ▲5Measure, track and drive improvement in code coverage across your engineering organization. Works with any CI service. Always free for open source. COVERALLS!

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