Free accessibility checker and rules engine from IBM, with a strong developer extension.
IBM's Equal Access Accessibility Checker provides a browser extension, a Node module and a rules engine covering WCAG and IBM's own supplementary requirements, with guidance written for developers. It is free and open source, and its extension is a credible alternative to axe DevTools for everyday checking.
Best for
Free and open source
Open sourceFree tier: Everything, self-hosted
What drives the bill: Free and open source. You pay in engineering time and CI minutes.
Check current pricing on IBM’s siteFigures are indicative and were last reviewed August 2026. Vendors change pricing often; confirm before you commit.
No reviews of IBM Equal Access Toolkit yet. If you have used it in anger, yours would be the first.
If IBM Equal Access Toolkit is not the right fit, these solve the same problem differently.
Accessibility
The open-source accessibility rules engine almost every other tool is built on.
Accessibility
Command-line accessibility testing for CI, with a dashboard for tracking over time.
Accessibility
Google's built-in audit for performance, accessibility, SEO and best practices.