Codecov

Codecov is a hosted service that tracks how much of a codebase is covered by tests. It reads coverage reports from CI runs and posts results on pull requests, so reviewers can see which new lines lack tests before merging.

Beyond coverage, the product highlights test analytics, with details on which tests failed on which lines in a pull request, flaky test detection, re-running flaky tests with a copyable name and stack trace, and tracking test suite performance over time. It also mentions JavaScript bundle size tracking and AI features that suggest unit tests and review pull requests. Sign-in is available through GitHub, GitLab, Bitbucket and Sentry.

Codecov is proprietary software offered as a hosted service with documentation, an API and enterprise support, and the site invites teams to try it for free. It is relevant to development teams that want coverage gates and test insights built into their pull request workflow.