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