Biome vs Code Climate Quality

Free and open source

From $16 per user/month (indicative)

Free and open source. You pay in engineering time and CI minutes.

Per-seat pricing; free for public repositories.

Everything, self-hosted

Free for open-source repositories.

Widely used

Biome / OSS community · since 2023

Established

Code Climate · since 2011

• Dramatically faster than ESLint plus Prettier, which matters on pre-commit hooks.
• One binary and one config replaces two toolchains.
• Very good ESLint rule migration tooling.

• Maintainability grading is easy to communicate to non-engineers.
• Coverage and quality tracked together in one PR check.
• Free for open source.

• Rule coverage does not yet match ESLint's plugin ecosystem.
• No support for framework-specific plugin ecosystems at ESLint's depth.
• Young project, so expect churn.

• Less depth and fewer languages than SonarQube.
• Letter grades oversimplify and can drive the wrong behaviour.
• Product investment appears to have slowed.

New JavaScript projects and teams frustrated by lint performance.

Teams that want a simple maintainability signal in pull requests.