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AChecker vs AccessibilityChecker.org: catalog facts
AChecker	AccessibilityChecker.org
Free Single checks are free; automatic monitoring is a paid ACHECKS subscription.	Freemium The basic scan is free; the monitoring platform and services are paid with a free trial.
Web	Web, Browser extension
Checks by URL, file upload or pasted HTML Choice of several guideline sets and levels	Free scan with an overview of every issue Fix instructions for each problem
Guidelines stop at WCAG 2.0 Older interface with limited explanation of fixes	Ongoing monitoring and remediation are paid Automated scans cannot confirm full compliance
Web application	Web application, Hosted service, Browser extension
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	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.