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WAVE vs Stark: catalog facts
WAVE	Stark
Freemium The online tool and extensions are free; the API and stand-alone testing engine are paid.	Freemium Free sign-up available, with paid plans and demos for organisations.
Web, Browser extension	Web, Browser extension
Shows issues in place on the page Extensions for Chrome, Firefox and Edge	Covers design, browser and code stages in one suite Free sign-up for individuals
Bulk testing requires the paid API or engine Automated results still need human judgement	Aimed mainly at companies, with advanced features behind sales Requires an account
Web application, Browser extension	Web application, Hosted service, Browser extension
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account 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.