Jest Axe

jest-axe is a small open-source library that wires Deque's axe-core accessibility engine into Jest, so accessibility checks can run as normal unit tests. A typical usage renders a component, passes the resulting DOM to axe, and asserts there are no violations with a `toHaveNoViolations()` matcher — the same way a team would assert on any other expected output.

It is a testing-library wrapper, not a standalone product or company: there is no pricing, dashboard, or paid tier, and it is maintained as a community open-source package on GitHub and npm. It's most useful for catching regressions in component-level accessibility (missing labels, bad contrast in rendered markup, invalid ARIA attributes) early, before a page ever reaches manual QA or a full axe DevTools scan.

Because it only tests what's rendered in a component test, it won't catch page-level or interaction-level issues like keyboard trap bugs — teams typically pair it with Cypress-axe or manual testing for full-page coverage.