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Percy vs Diffy: catalog facts
Percy	Diffy
Freemium Hosted service from BrowserStack; plan details are listed on the Percy site.	Paid Commercial service; plan prices are not given in the research.
Web	Web
Catches visual UI changes across browsers and screen widths Built-in review step for approving visual differences	Compares screenshots across local, staging and production AI summaries sort changes by type and impact
Hosted service only, no self-hosted option Closed source	Hosted service; screenshots are taken on its infrastructure Pricing not stated on the homepage
Hosted service	Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 2, 2026

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