Biome vs DeepSource

Free and open source

From $8 per user/month (indicative, Starter)

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

Among the cheapest per-developer options with autofix included.

Everything, self-hosted

Free for open source and small teams.

Widely used

Biome / OSS community · since 2023

Established

DeepSource · since 2019

• 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.

• Autofix commits remove the tedious half of acting on findings.
• Low false-positive rate keeps developers engaged with the tool.
• Cheap and quick to adopt.

• 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.

• Narrower language coverage than SonarQube.
• Smaller vendor with less enterprise governance tooling.
• Autofix still needs review — it is not unattended.

New JavaScript projects and teams frustrated by lint performance.

Teams that want static analysis developers do not resent.