# Codecov

> Codecov is a code coverage and quality platform that measures test coverage, flags flaky tests, and uses AI to generate unit tests and review pull requests.

Codecov is a code coverage and quality platform now operated by Harness Inc., branded as "Codecov by Harness." It goes beyond measuring which lines of code are tested—it uses AI to generate unit tests, review pull requests, track flaky tests, and monitor JavaScript bundle sizes, all surfaced directly in the pull request workflow.

## What It Is

Codecov is a developer tool that integrates with CI/CD pipelines and code hosts to collect, analyze, and report on test coverage data. It surfaces coverage gaps, test failures, and bundle size changes as pull request comments, so developers can act on quality signals without leaving their workflow. The platform supports any programming language and works with all major CI tools and code hosts.

## Core Capabilities

Codecov's feature set spans several distinct quality dimensions:

- **Code Coverage**: Tracks which lines are covered by tests, with PR comments showing coverage changes, customizable analysis, and support for any language or CI tool.
- **AI Test Generation**: Allows developers to prompt Codecov AI directly in a PR comment to generate unit tests for uncovered code.
- **Test Analytics**: Identifies flaky and failing tests in pull requests, provides copy-pasteable test names and stack traces for re-running, and tracks test suite performance over time.
- **Bundle Analysis**: Monitors JavaScript bundle size changes per PR, tracks size over time at the asset and module level, and enforces size limits via status checks.
- **PR Code Review**: Delivers immediate, detailed feedback and code suggestions on pull requests without requiring additional reviewer bandwidth.

## Platform and Integration Breadth

Codecov is designed to fit into any existing stack. The platform supports over 30 programming languages including Python, JavaScript, TypeScript, Go, Ruby, Rust, Swift, Kotlin, C#, C++, and many more. CI platform integrations include GitHub Actions, GitLab CI, CircleCI, Jenkins, Travis CI, Azure Pipelines, Bitbucket Pipelines, Buildkite, and others. Code host support covers GitHub, GitLab, Bitbucket, and their self-hosted enterprise variants. Login is available via GitHub, GitLab, Bitbucket, or Sentry.

## Deployment and Access Model

Codecov operates as a web-based SaaS platform. Developers authenticate through their existing code host accounts and connect repositories without installing a separate desktop application. An API is available for programmatic access, and documentation covers setup for each supported language and CI environment. Enterprise customers have access to dedicated support channels.

## Update: Harness Acquisition and Rebranding

The homepage banner and footer confirm that Codecov is now part of Harness Inc., operating under the "Codecov by Harness" brand. A blog post linked from the homepage is titled "A New Chapter for Codecov," signaling a product direction update tied to the acquisition. The footer copyright reads "© 2026 Harness Inc.," and legal terms now point to Harness's privacy and terms-of-use pages. The product continues to operate at codecov.io with the same core feature set, now expanded with AI capabilities positioned as part of "code coverage for the AI era."

## Features
- Code coverage measurement and reporting
- AI-powered unit test generation
- AI pull request code review
- Test analytics and flaky test detection
- JavaScript bundle size analysis
- Pull request comments with coverage and test insights
- Customizable coverage analysis
- Status checks for coverage and bundle size thresholds
- Support for 30+ programming languages
- Integration with all major CI platforms
- GitHub, GitLab, and Bitbucket support
- Test suite performance tracking over time
- Copy-pasteable test names and stack traces for re-running tests
- Module-level bundle asset drill-down

## Integrations
GitHub, GitLab, Bitbucket, GitHub Enterprise, GitLab CE/EE, Bitbucket Server, GitHub Actions, GitLab CI, Travis CI, CircleCI, Bitrise, Jenkins, Bamboo, AppVeyor, Azure Pipelines, Bitbucket Pipelines, Buildkite, Codefresh, Drone, Shippable, Wercker, Buildbot, Sentry

## Platforms
WEB, API, CLI

## Pricing
Freemium — Free tier available with paid upgrades

## Links
- Website: https://codecov.io
- Documentation: https://docs.codecov.io
- Repository: https://github.com/codecov
- EveryDev.ai: https://www.everydev.ai/tools/codecov