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Sa11y vs WAVE: catalog facts
Sa11y	WAVE
Free Free and open source.	Freemium The online tool and extensions are free; the API and stand-alone testing engine are paid.
Web, Self-hosted	Web, Browser extension
Shows issues in place with plain fix instructions Over 80 checks with rules you can switch off	Shows issues in place on the page Extensions for Chrome, Firefox and Edge
Aimed at content issues, not a full code audit Needs to be added to a site or CMS by a developer	Bulk testing requires the paid API or engine Automated results still need human judgement
Self-hosted	Web application, Browser extension
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 24, 2026	Official website Full listing and sources Checked September 23, 2026

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