ESLint 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.

Category standard

OpenJS Foundation · since 2013

Established

DeepSource · since 2019

• 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.

• 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.

• 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.

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

Every JavaScript and TypeScript project.

Teams that want static analysis developers do not resent.