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