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axe DevToolsPa11y
Freemium

The browser extension has a free tier; wider toolkits are paid and sold through Deque.

 Free

Free and open source.

Web, Browser extension Self-hosted, Command line
  • Built on the widely used axe-core rules engine
  • Checks run directly in the browser on the current page
  • Command-line tool for quick one-off accessibility checks
  • CI tool for testing a list of pages in builds
  • Automated checks do not replace manual accessibility testing
  • Advanced features are enterprise products sold through sales
  • Automated checks catch only part of all accessibility problems
  • The dashboard requires running your own server
Hosted service, Browser extension Downloadable app, Self-hosted
Closed source Open source
License not stated License not stated
Not stated if an account is needed No account needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.