ESLint vs Biome

Free and open source

Free and open source

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

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

Everything, self-hosted

Everything, self-hosted

Category standard

OpenJS Foundation · since 2013

Widely used

Biome / OSS community · since 2023

• The plugin ecosystem lets you enforce almost any convention as a rule.
• Autofix handles a large share of findings without human effort.
• Universal — every JavaScript tool integrates with it.

• 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.

• Configuration is a real project of its own, and the flat-config migration caused significant churn.
• Slow on large codebases without caching.
• Rule sprawl produces bikeshedding unless someone owns the config.

• 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.

Every JavaScript and TypeScript project.

New JavaScript projects and teams frustrated by lint performance.