Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.
Entry price
From $40 per user/month (indicative, Pro)
Free tierFrom $0.04 per page (API, indicative)
Free tierWhat drives the bill
The metric that actually scales your invoice.
Free extension covers a lot. Pro adds guided manual testing; enterprise plans are quote-based.
Free for interactive use; the API is priced per page for bulk scanning.
Free tier
Free browser extension with the core axe-core rule set.
Browser extension and single-page online checker are free.
Open source
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Widely used
Deque Systems · since 2015
Widely used
WebAIM (Utah State University) · since 2001
Strengths
Limitations
Best for
Organisations with a formal accessibility programme and compliance obligations.
Designers and developers learning accessibility, and quick manual spot checks.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.