We built Happo because we love crafting beautiful interfaces — and we never wanted shipping code to take that joy away. When designs break silently in a large team, the magic disappears. Happo keeps it alive.
Happo automatically catches visual regressions in your CI pipeline on every commit — before they reach your users. Ship freely, knowing that nothing will silently break.
Side-by-side visual comparisons make it instantly clear what a code change actually does to your UI. No manual checking, no surprises in production.
Chrome, Firefox, Safari, Edge — Happo covers them all. Write your code once and trust that it will look right everywhere your users are.
Engineers all around the world reach for Happo by choice.
Happo allows us to make changes to components used on hundreds of screens and upgrade core UI dependencies with confidence. It has been a big productivity boost over our previous workflow.
Happo to the rescue! It's a direct competitor to Percy, but it's much cheaper, supports more browsers, and is easier to use. Another big selling point? It supports Cypress integration.
Our Playwright E2E tests passed successfully, as the app's functionality remained intact. However, Happo detected the unwanted changes in the text's color and positioning, which would have been noticeable and disruptive to users.
Happo is a trusted solution for software companies across the globe. Our customers range from Fortune 500 companies in San Francisco to innovative web agencies in Brazil, and established insurance companies in Japan. Organizations of all sizes and industries rely on Happo to stabilize their user interfaces.
Make sure your designs look good on every screen size and in different browsers. Keep the confidence up by letting Happo catch visual changes before they reach production.
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Find bugs before your code is shipped to production. Visual regression testing with Happo lets you move faster and with more confidence. Use it with Storybook, Cypress, Playwright, or create your own integration.
See the effects of changes directly
Test individual components in isolation
Say goodbye to tedious manual testing
Happo is a straight up life-saver. How many times did you think your change was contained only to discover that ten other teams started using what you built, and your change breaks three of the ten? Without Happo, you might not know.
Happo gives us the confidence that we are not introducing any unwanted visual changes in our pull requests. Something that pure end-to-end tests cannot always cover.
Happo supports the latest versions of most browsers and emulators. Their speed of image comparison is impressive. They also have GitHub and CI integration and plugins to support Storybook and Cypress directly.
We provide integrations with developer tools like Storybook, Cypress, Playwright, GitHub Actions, Circle CI, and others. Focus on writing the code and we will take care of producing consistent screenshots.
For web projects, Happo uses Chrome, Firefox, Safari, iOS Safari, and Edge to take screenshots of components. Native apps can integrate directly with the Happo API.
Give Happo a try. Convince your team to test it out. You'll have better tests and a better looking application that will not change day to day for the worse.
The fantastic thing about the test framework is that it lays a foundation for automatically showing every screen in the app and running dynamically generated test code on each one.
While CI functional tests are helpful they can't catch visual issues like layout shifts or SVG chart rendering. Happo has become essential to our testing strategy ensuring high-quality products with minimal effort.