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Stark vs ARC Toolkit: catalog facts
Stark	ARC Toolkit
Freemium Free sign-up available, with paid plans and demos for organisations.	Free Free to install from the Chrome Web Store.
Web, Browser extension	Browser extension
Covers design, browser and code stages in one suite Free sign-up for individuals	Runs inside the browser on the current page Uses TPGi's ARC rules engine
Aimed mainly at companies, with advanced features behind sales Requires an account	Checks one page at a time Automated checks do not replace manual testing
Web application, Hosted service, Browser extension	Browser extension
Closed source	Closed source
License not stated	License not stated
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.