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Rocket Validator vs Pa11y: catalog facts
Rocket Validator	Pa11y
Paid Paid subscription service with a free trial.	Free Free and open source.
Web	Self-hosted, Command line
Site-wide HTML and accessibility checks in one report Up to 5,000 pages per report	Command-line tool for quick one-off accessibility checks CI tool for testing a list of pages in builds
Paid service after the trial Requires an account	Automated checks catch only part of all accessibility problems The dashboard requires running your own server
Hosted service	Downloadable app, Self-hosted
Closed source	Open source
License not stated	License not stated
Account needed	No account needed
Needs internet	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.