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Pa11y vs Tanaguru Engine: catalog facts
Pa11y	Tanaguru Engine
Free Free and open source.	Free Offered free as part of Tanaguru's open-source solutions.
Self-hosted, Command line	Self-hosted
Command-line tool for quick one-off accessibility checks CI tool for testing a list of pages in builds	Automates about 380 accessibility tests Audits pages, whole sites, web apps and templates
Automated checks catch only part of all accessibility problems The dashboard requires running your own server	Automation cannot check every accessibility criterion Licence and installation details are not given on the product page
Downloadable app, Self-hosted	Self-hosted
Open source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is 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 23, 2026

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