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Work · December 21, 2015

GoodUI Evidence

People's A/B test results that show which UI ideas work best

GoodUI Evidence launched on December 21, 2015 with 300 votes, #36 of 3,505 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 10 years on.

Visit goodui.org ↗GoodUI Evidence alternativestop 1% of December 2015

In plain words

GoodUI Evidence is a platform that aggregates A/B testing results from multiple companies to identify repeatable UI patterns that improve conversions. It catalogs 141 patterns derived from 640 tests across nearly 149 million visitors, showing which design approaches consistently win or lose. Users gain access to this research library plus monthly one-on-one consultation calls with founder Jakub Linowski to review their own experiments and receive written analysis reports.

written from the facts on this page · September 2026

From the sources

Hi, I’m Jakub and our goal here is to identify repeatable patterns with the highest probabilities of working for you. To do this we run experiments with trusted companies open to testing similar ideas and then sharing their results. So far we have identified 141 patterns based on 640 tests . Some patterns are better than others. We publish everything. Total sample size of all tests is based on 148,836,553 visitors - that's a lot of testing time to do on your own. Each month, Jakub Linowski, founder of GoodUI, gets on a 1-hour call to review one of your experiments — plus a written report covering test design, power calculations, UI changes, metrics, triggering, and run duration. Get access…from goodui.org

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Source: Product Hunt launch ↗

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