Pa11y vs Lighthouse

Compare Pa11y and Lighthouse on the same questions, with pricing terms and sources shown where they are known.

Pa11y

Free, open source accessibility testing tools for developers and designers to identify and fix web accessibility issues

View Pa11y

Lighthouse

Automate web performance, accessibility, SEO, and best practice audits for any web page — public or authenticated.

View Lighthouse

Comparison table

Unknown means no reliable value is stored, not that a feature is missing.

Facts compared for Pa11y and Lighthouse
QuestionPa11yLighthouse
Pricing modelSame for bothFreeFree
Free planSame for bothYesYes
PlatformsDiffersWebLinux, macOS, Web, Windows
Listed featuresDiffers
  • Command-Line Testing
  • Automated Daily Testing
  • Progress Tracking
  • JSON Webservice API
  • CI Integration
  • Performance audits
  • Accessibility audits
  • Best Practices audits
  • SEO audits
  • Audit reports

Pricing and limits

Plans can differ in scope, region and billing terms, so compare plan names rather than assuming equivalence.

Pa11y

Free plan: Yes

Subscriptions

  • Listed price: Free

Pricing verification date unknown. A check was attempted on Sep 22, 2026 but no value was found; that does not verify the prices.

Lighthouse

Free plan: Yes

Subscriptions

  • Listed price: Free

Pricing verification date unknown.

Related pages