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AChecker vs AccessMonitor: catalog facts
AChecker	AccessMonitor
Free Single checks are free; automatic monitoring is a paid ACHECKS subscription.	Free Free public service.
Web	Web
Checks by URL, file upload or pasted HTML Choice of several guideline sets and levels	Checks against WCAG 2.1 Gives a single 0 to 10 quality score
Guidelines stop at WCAG 2.0 Older interface with limited explanation of fixes	Interface is primarily in Portuguese Automated checks cannot replace a manual accessibility review
Web application	Web application
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.