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Open-source accessibility testing tools: 9 compared

Automated accessibility checkers and rule engines.

9 tools are listed here. Each one is open source under an OSI-approved license and meets the inclusion rules. The table is sorted by GitHub stars, descending, on the fetch date. Select a column heading to sort by another column.

Metrics as of , from the GitHub or GitLab API of each repository. Refreshed monthly.

Accessibility testing tools. Sorted by GitHub stars, descending. Select a column heading to change the sort.
Lighthouse30,79912026-09-181v13.5.02026-09-181Apache-2.0JavaScriptactive
axe-core7,54212026-08-051v4.13.02026-09-211MPL-2.0HTMLactive
Lighthouse CI7,09412025-06-261v0.15.12025-06-261Apache-2.0JavaScriptinactive
Pa11y4,53612026-08-28110.0.02026-08-281LGPL-3.0JavaScriptactive
Accessibility Insights for Web95212026-09-081web@2.49.02026-09-151MITTypeScriptactive
equal-access77812026-09-0814.0.342026-09-081Apache-2.0JavaScriptactive
axe-core-npm72412026-08-111v4.13.02026-09-021MPL-2.0JavaScriptactive
cypress-axe64112025-08-291v1.7.02026-09-031MITTypeScriptactive
Pa11y CI63312026-05-1214.1.12026-05-121LGPL-3.0JavaScriptslow

1 Fetched from the GitHub or GitLab API on . Hover a value for its own date.

Comparisons in this category

Guide

Open-source accessibility testing tools: how the list is sorted and what each covers