Software · head to head
ESLint vs SonarQube
SonarQube
Software
Code quality and code security for clean code, at every step
- From
- Free
- Rated
- -
The short version
- Each has a real cost: ESLint slow performance on large codebases compared to newer tools like Oxlint and Biome; SonarQube free tier caps at 50,000 lines of code for private projects, per sonarsource.com/plans-and-pricing (Aug 2026); larger private codebases require the $34 per month Team plan or above
Where they differ
Only the attributes on which ESLint and SonarQube actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown).
What people use each for
The jobs each tool is most often brought in to do.
ESLint
- Statically analysing JavaScript and JSX to find problems before runtimenot SonarQube
- Automatically fixing issues with syntax-aware rewritesnot SonarQube
- Enforcing a consistent code style across a teamnot SonarQube
- Running as a CI step to block non-conforming codenot SonarQube
- Writing custom rules for project-specific conventionsnot SonarQube
SonarQube
No use cases recorded yet. See the SonarQube review.
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
ESLint
- Slow performance on large codebases compared to newer tools like Oxlint and Biome
- Complexity in configuration from scratch, particularly for TypeScript support
- Limited built-in TypeScript support, requiring separate parsers and coordination with new TypeScript features
SonarQube
- Free tier caps at 50,000 lines of code for private projects, per sonarsource.com/plans-and-pricing (Aug 2026); larger private codebases require the $34 per month Team plan or above
- Advanced security features like CVE detection, malicious package detection and SBOM are a separate paid add-on with custom pricing, per SonarSource's own pricing page, not included even in the Enterprise plan's base price
Pricing, plan by plan
ESLint
FreeNo published plan breakdown. See the ESLint review.
SonarQube
FreeNo published plan breakdown. See the SonarQube review.
Which should you pick?
Choose ESLint if
- You want to start without paying.
- You work on Browser-based JavaScript, Node.js, Any JavaScript environment.
Questions people ask
- Is ESLint or SonarQube better?
- Neither clearly leads. ESLint starts at Free and SonarQube at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, ESLint or SonarQube?
- ESLint starts at Free and SonarQube at Free.
- Does ESLint or SonarQube run on more platforms?
- ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment. SonarQube runs on Web.
- Can I use ESLint for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is ESLint best used for?
- ESLint is most often used for statically analysing javascript and jsx to find problems before runtime, automatically fixing issues with syntax-aware rewrites, enforcing a consistent code style across a team, running as a ci step to block non-conforming code. Of those, statically analysing javascript and jsx to find problems before runtime and automatically fixing issues with syntax-aware rewrites are not what SonarQube is typically brought in for.
Answered from the vendors’ own pages
ESLint: Does ESLint automatically fix code issues?
Many problems ESLint finds can be automatically fixed via the --fix flag. ESLint fixes are syntax-aware so you won't experience errors introduced by traditional find-and-replace algorithms.
SourceESLint: How much does ESLint cost?
ESLint is completely free and open-source software maintained by the OpenJS Foundation. The project accepts voluntary donations from sponsors.
SourceESLint: Can I write custom ESLint rules?
Yes. You can develop custom rules that work alongside built-in functionality through ESLint's plugin system, allowing complete customization for your project needs.
SourceRelated pages
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