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Developer Tools · head to head

ESLint vs Zephyr Scale

ESLint logo

ESLint

Developer Tools

Find and fix problems in JavaScript code

From
Free
Rated
-
Full reviewWebsite
Zephyr Scale logo

Zephyr Scale

Testing

Native test management for Jira

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only ESLint has a free tier, so it costs nothing to try first.
  • Each has a real cost: ESLint slow performance on large codebases compared to newer tools like Oxlint and Biome; Zephyr Scale tightly bound to Jira; limited standalone functionality outside Jira ecosystem

Where they differ

Only the attributes on which ESLint and Zephyr Scale actually diverge.

Attributes where ESLint and Zephyr Scale differ
AttributeESLintZephyr Scale
Starting priceFreeOn request
Pricing modelUnknownquote
Free tierYesNo
PlatformsBrowser-based JavaScript, Node.js, Any JavaScript environmentWeb
CategoryDeveloper ToolsTesting
Founded2019Unknown

Identical on both: user rating (Not yet rated).

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

Zephyr Scale

  • Test case management within Jira workflowsnot ESLint
  • Manual and automated test execution trackingnot ESLint
  • Cross-project test asset reusenot ESLint
  • Requirements traceability from stories to testsnot ESLint
  • CI/CD pipeline and BDD framework integrationnot 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

Zephyr Scale

  • Tightly bound to Jira; limited standalone functionality outside Jira ecosystem
  • No-code automation features limited in Standard tier, expanded only in Advanced
  • Data residency feature unavailable for Essential tier, limiting enterprise compliance
  • Transparent cost structure not provided on marketing page

Pricing, plan by plan

ESLint

Free

No published plan breakdown. See the ESLint review.

Zephyr Scale

On request

No published plan breakdown. See the Zephyr Scale 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.
ESLint review

Choose Zephyr Scale if

Nothing in the data separates Zephyr Scale from ESLint on the points above - pick on price and on how each one feels to use.

Zephyr Scale review

Questions people ask

Is ESLint or Zephyr Scale better?
Neither clearly leads. ESLint starts at Free and Zephyr Scale at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ESLint or Zephyr Scale?
ESLint has a free tier; the other does not. Paid plans start at Free for ESLint and On request for Zephyr Scale.
Does ESLint or Zephyr Scale run on more platforms?
ESLint runs on Browser-based JavaScript, Node.js, Any JavaScript environment. Zephyr Scale runs on Web.
Can I use ESLint for free?
Yes. ESLint has a free tier, so you can try it without paying. Zephyr Scale starts at On request.
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 Zephyr Scale 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
Zephyr Scale: How much does Zephyr Scale cost?

Zephyr Scale pricing is not published on the website. Three tiers are available: Essential, Standard, and Advanced, plus QMetry for Jira. Contact SmartBear or visit Atlassian Marketplace for pricing details.

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
Zephyr Scale: Is there a free trial available?

Yes, Zephyr offers free trials for Essential, Standard, and Advanced tiers, as well as for QMetry. Visit the product page to start a trial.

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
Zephyr Scale: Does Zephyr Scale work outside of Jira?

Zephyr Scale is tightly integrated with Jira for test management. For standalone test management outside Jira, SmartBear offers QMetry as an alternative.

Source
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