Compare software

Accessibility InsightsAccessibilityChecker.org
Free

Free and open source, published by Microsoft.

 Freemium

The basic scan is free; the monitoring platform and services are paid with a free trial.

Windows, Browser extension Web, Browser extension
  • FastPass catches common issues in a few minutes
  • Guided assessment against WCAG 2.1 AA
  • Free scan with an overview of every issue
  • Fix instructions for each problem
  • Web extension targets Chrome and Edge only
  • Desktop tool is Windows only
  • Ongoing monitoring and remediation are paid
  • Automated scans cannot confirm full compliance
Downloadable app, Browser extension Web application, Hosted service, Browser extension
Open source Closed source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Needs internet

Checked September 23, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.