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WAVE vs AChecker: catalog facts
WAVE	AChecker
Freemium The online tool and extensions are free; the API and stand-alone testing engine are paid.	Free Single checks are free; automatic monitoring is a paid ACHECKS subscription.
Web, Browser extension	Web
Shows issues in place on the page Extensions for Chrome, Firefox and Edge	Checks by URL, file upload or pasted HTML Choice of several guideline sets and levels
Bulk testing requires the paid API or engine Automated results still need human judgement	Guidelines stop at WCAG 2.0 Older interface with limited explanation of fixes
Web application, Browser extension	Web application
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Needs internet
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.