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Pa11y vs AccessMonitor: catalog facts
Pa11y	AccessMonitor
Free Free and open source.	Free Free public service.
Self-hosted, Command line	Web
Command-line tool for quick one-off accessibility checks CI tool for testing a list of pages in builds	Checks against WCAG 2.1 Gives a single 0 to 10 quality score
Automated checks catch only part of all accessibility problems The dashboard requires running your own server	Interface is primarily in Portuguese Automated checks cannot replace a manual accessibility review
Downloadable app, Self-hosted	Web application
Open source	Closed 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.