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Developer Tools · head to head

ESLint vs Exa

ESLint logo

ESLint

Developer Tools

Find and fix problems in JavaScript code

From
Free
Free plan
Yes
Visit ESLintFull review
Exa logo

Exa

Business Intelligence

Web search, built for AI agents

From
Free
Free plan
Yes
Visit ExaFull review

The short version

  • ESLint is free; Exa starts at $7/mo.
  • Where ESLint falls short: slow performance on large codebases compared to newer tools like Oxlint and Biome.
  • Where Exa falls short: usage-based pricing can be unpredictable without volume discounts upfront.
  • Prices and features on this page were last checked on 13 November 2026.

Where they differ

Only the attributes on which ESLint and Exa actually diverge.

Attributes where ESLint and Exa differ
AttributeESLintExa
PlatformsAPIWeb
CategoryDeveloper ToolsBusiness Intelligence

Identical on both: starting price (Free), free tier (Yes).

Not yet recorded: pricing model for ESLint, founded for Exa.

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 Exa
  • Automatically fixing issues with syntax-aware rewritesnot Exa
  • Enforcing a consistent code style across a teamnot Exa
  • Running as a CI step to block non-conforming codenot Exa
  • Writing custom rules for project-specific conventionsnot Exa

Exa

  • Web search and research APIsnot ESLint
  • Content extraction and analysisnot ESLint
  • Real-time monitoring and alertsnot ESLint

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

Exa

  • Usage-based pricing can be unpredictable without volume discounts upfront
  • Enterprise customers need to contact sales for custom volume discount plans

Pricing, plan by plan

ESLint

Free

No published plan breakdown. See the ESLint review.

Exa

Free
  • Free TierFree
    • $20 in free credits (approximately 2,800 searches)
    • $10 in monthly credits after first month
  • Search$7
    • Standard search functionality
  • Deep Search$12
    • In-depth search results
  • Contents$1/per 1000 pages
    • Content extraction

Which should you pick?

Choose ESLint if

  • You want to start without paying.
  • You work on API.
ESLint review

Choose Exa if

  • You want to start without paying.
Exa review

Questions people ask

Is ESLint or Exa better?
Neither clearly leads. ESLint starts at Free and Exa at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ESLint or Exa?
ESLint starts at Free and Exa at Free.
Does ESLint or Exa run on more platforms?
ESLint runs on API. Exa 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 Exa 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.

Source
Exa: How much does Exa API cost?

Exa uses pay-as-you-go pricing with no subscription or minimum spend required. Search costs USD$7 per 1000 requests, Deep Search costs USD$12-15 per 1000 requests, and Contents costs USD$1 per 1000 pages. Users load credits and are charged at these published rates.

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
Exa: Is there a free tier for Exa?

Yes, new accounts receive USD$20 in free credits (approximately 2,800 searches) plus USD$10 in additional credits every month. This allows developers to test the API before committing to paid usage.

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
Exa: What other costs are associated with Exa?

Beyond the main API costs, Exa charges USD$1 per 1000 results beyond the first 10 returned, USD$1 per 1000 pages for AI summaries, and USD$0.10 per Agent Compute Unit for autonomous agent usage. Contact enrichment features cost USD$0.02 per email and USD$0.07 per phone number.

Source
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