OpenLint

At a glance

• Editor score
  7.6 / 10
• Pricing
  Free plan
• Best for
  Teams needing custom rules across API formats
• Free plan
  Yes
• Paid from
  Free
• OpenAPI linting
  Yes
• Founded
  2026
• Facts checked
  14 Nov 2026

• Where it wins

  • Built-in rulesets cover OpenAPI, AsyncAPI, and Arazzo.
  • Teams can create custom rulesets and JavaScript or TypeScript functions.
  • Runs locally and can be used in CI workflows.

• Where it doesn't

  • Support is community-based.
  • The project was established in September 2026, so its track record is young.
  • It focuses on linting JSON and YAML API artifacts, not broader API management.

Our verdict on OpenLint

OpenLint is a community-developed, open-source linter and ruleset project for teams that want to check API artifacts against consistent standards. Its CLI and packages lint JSON and YAML, with built-in rulesets for OpenAPI, AsyncAPI, and Arazzo. Teams can also define custom rulesets and JavaScript or TypeScript functions, making it a fit for organizations with API style guides that extend beyond default checks. It is intended for individual contributors as well as small, mid-market, and enterprise teams.

OpenLint’s scope is useful when a team works across several API description formats or wants the same checks in developer workflows and continuous integration. Linting runs locally rather than sending API descriptions or rulesets to an OpenLint service, and the tools can be used in CI workflows or IDEs. The project also maintains a ruleset specification and conformance work in public. It is focused on validation and rule authoring, though; teams looking for a broader API design, governance, or management suite should look elsewhere.

The project describes itself as free and open source, with self-hosted deployment and support through the community. Its tools run on Linux, Windows, and macOS. The project was established in September 2026, so its published maturity signals are limited compared with a long-established product. That makes OpenLint most appropriate for teams comfortable adopting community-developed tooling and evaluating its rulesets for their own standards. Teams that need vendor-backed support or an established support structure should consider alternatives. There are no AI features; the value here is configurable linting, not AI-assisted review.

Your product? Our editors can test OpenLint in depth and publish a review, labelled as paid · from $149/mo →

OpenLint pricing

OpenLint fact sheet

Alternatives to OpenLint

• SpectralA customizable JSON and YAML linter for teams enforcing OpenAPI and AsyncAPI standards.8.8
• ZZallyA focused OpenAPI linter with REST API, CLI, web UI, and configurable rules.7.9
• APIMaticAPI linting and validation alongside SDK, documentation and portal generation.7.9

See all OpenLint alternatives →

OpenLint vs the competition

• OOpenLint vs Spectral
• OZOpenLint vs Zally
• OOpenLint vs APIMatic
• OOpenLint vs vacuum
• OIOOpenLint vs IBM OpenAPI Validator
• OTOpenLint vs Thymian

Compare OpenLint with any tool side by side →

Featured on iTechGuides

OpenLint is listed in our API Linting Tools directory. Add the badge to your site — it links back to this page.

<a href="https://www.itechguides.com/products/openlint/"><img src="https://www.itechguides.com/best/badge/openlint.svg" alt="Featured on iTechGuides" width="230" height="46"></a>

Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated 15 Nov 2026 · How we research and update