Compare software

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

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