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Pa11y vs IBM Equal Access Accessibility Checker: catalog facts
Pa11y	IBM Equal Access Accessibility Checker
Free Free and open source.	Free Free and open source, published by IBM on GitHub.
Self-hosted, Command line	Browser extension, Command line
Command-line tool for quick one-off accessibility checks CI tool for testing a list of pages in builds	Same rule engine in the browser and in automated builds Integrations for Cypress, Karma, Vitest and Java
Automated checks catch only part of all accessibility problems The dashboard requires running your own server	Automated checks cannot catch every accessibility problem Build integrations need some setup in a test suite
Downloadable app, Self-hosted	Downloadable app, Browser extension
Open source	Open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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