Percy

Percy (part of BrowserStack) is a visual testing and review platform - automatically capturing screenshots of web UIs and using AI to detect visual regressions between code changes, so engineering teams catch unintended layout, style, and component changes before users see them. AI capabilities include AI-powered visual diff that distinguishes meaningful visual changes from rendering noise like anti-aliasing and font differences, intelligent baseline management that automatically updates approved screenshots as the UI evolves, smart grouping that organizes visual changes by component and severity, automated cross-browser visual testing that identifies browser-specific rendering issues, AI noise reduction that eliminates false positives from dynamic content, and CI/CD integration that blocks deployments when unapproved visual changes are detected.

Percy is an established visual testing platform that has integrated AI visual diff, intelligent noise reduction, and smart change grouping into a mature visual regression testing product.