Compare software

Accessibility Insights vs Sa11y: catalog facts
Accessibility Insights	Sa11y
Free Free and open source, published by Microsoft.	Free Free and open source.
Windows, Browser extension	Web, Self-hosted
FastPass catches common issues in a few minutes Guided assessment against WCAG 2.1 AA	Shows issues in place with plain fix instructions Over 80 checks with rules you can switch off
Web extension targets Chrome and Edge only Desktop tool is Windows only	Aimed at content issues, not a full code audit Needs to be added to a site or CMS by a developer
Downloadable app, Browser extension	Self-hosted
Open source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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