AATT

At a glance

• Editor score
  3.0 / 10
• Pricing
  Free plan
• Best for
  Open-source developers needing a testing API
• Free plan
  Yes
• Paid from
  Free
• WCAG coverage
  Wcag 2.1
• Facts checked
  19 Sep 2026

• Where it wins

  • Evaluates web pages with Axe, HTML CodeSniffer, or Chrome developer tools
  • Provides a local web app and an API, including the /evaluate endpoint
  • Supports Node.js use and NemoJS and NightwatchJS integrations

• Where it doesn't

  • Automated testing focus may not suit teams seeking manual review
  • No remediation guidance is described
  • The repository has no published releases

Our verdict on AATT

AATT is an open-source Node.js tool for automated accessibility testing of web applications. It is aimed at developers who want to evaluate pages through an API, a local web application, or an automation workflow. Its evaluation engines include Axe, HTML CodeSniffer, and Chrome developer tools, giving teams several ways to run checks rather than a single engine. The tool is primarily suited to technical teams building accessibility checks into their web testing process, not buyers looking for a manual audit service.

Its notable strength is the combination of evaluation options and workflow hooks. AATT can be used as a Node.js module, and the API can evaluate HTML source through the /evaluate endpoint. The product also integrates with NemoJS and NightwatchJS, with Selenium among its listed integrations. Coverage differs by engine: WCAG 2.1 support is specified for Axe, while HTML CodeSniffer offers WCAG 2A, WCAG 2AA, WCAG 2AAA, and Section 508 options. Teams should therefore match their required criteria to the chosen engine instead of assuming every engine supports the same standards.

AATT is open source under the BSD license and has a free plan, so it may suit developers seeking a self-hosted testing API without a paid tier decision. Its narrow focus is also a limitation: the described capabilities center on automated evaluation, with no manual review or remediation guidance described. The repository has no published releases, which may matter to teams that prefer a release-based distribution workflow. Choose AATT when an open-source API and automation integrations fit the team's process; consider another option if manual assessment or remediation support is central.

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AATT pricing

AATT fact sheet

AATT integrations

AATT lists 6 integrations on its own site.

• Axe
• HTML CodeSniffer
• Chrome developer tools
• NemoJS
• NightwatchJS
• Selenium

Alternatives to AATT

• WAVEA low-cost starting point for page analysis, browser testing, and API automation.9.3
• IBM Equal Access Accessibility CheckerA broad free toolkit for automated web accessibility checks across development workflows.9.1
• Axe DevToolsA free-starting accessibility toolkit that extends from browser scans to CI/CD and APIs.8.9

See all AATT alternatives →

Featured on iTechGuides

AATT is listed in our Accessibility Testing Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update