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Software · head to head

SonarQube vs ESLint

S

SonarQube

Software

Code quality and code security for clean code, at every step

From
Free
Rated
-
Full reviewWebsite
ESLint logo

ESLint

Software

Find and fix problems in JavaScript code

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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; ESLint slow performance on large codebases compared to newer tools like Oxlint and Biome

Where they differ

Only the attributes on which SonarQube and ESLint actually diverge.

Attributes where SonarQube and ESLint differ
AttributeSonarQubeESLint
Pricing modelfreemiumUnknown
PlatformsWebBrowser-based JavaScript, Node.js, Any JavaScript environment
FoundedUnknown2019

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.

SonarQube

No use cases recorded yet. See the SonarQube review.

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

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

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

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

Pricing, plan by plan

SonarQube

Free

No published plan breakdown. See the SonarQube review.

ESLint

Free

No published plan breakdown. See the ESLint review.

Which should you pick?

Choose SonarQube if

  • You want to start without paying.
SonarQube review

Choose ESLint if

  • You want to start without paying.
  • You work on Browser-based JavaScript, Node.js, Any JavaScript environment.
ESLint review

Questions people ask

Is SonarQube or ESLint better?
Neither clearly leads. SonarQube starts at Free and ESLint at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, SonarQube or ESLint?
SonarQube starts at Free and ESLint at Free.
Does SonarQube or ESLint run on more platforms?
SonarQube runs on Web. ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment.
Can I use SonarQube for free?
Both have a free tier, so you can try either at no cost before committing.

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.

Source
ESLint: 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.

Source
ESLint: 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.

Source
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Related pages

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