GuessTheTest is the essential resource for experimenters who want objective A/B test case studies and helpful information to get testing ideas, insights, and best practices.

Every month, a new Featured Test  is showcased on GuessTheTest. It's presented in a "gamified" format, so you get to have fun and learn, guessing which test you think won, seeing the real-life results, and applying the findings to optimize your own digital marketing success.

You can sign up for FREE to get the Featured Test, plus other helpful resources on A/B testing and optimization delivered to your inbox monthly.

Our extensive A/B case study library of hundreds of archived tests – features an expanding collection of tests from organizations and agencies around the world. This library of test patterns provides useful data and insightful ideas to inspire testing and optimization on your own site. Every test is carefully curated to help you quickly optimize your testing efforts.

Within the testing archive, you can access the exact tests that big-name brands ran to produce money-making results; these tests represent millions of dollars in traffic and ad spend.

As well, every case study is filterable by topic so you can easily sort by testing patterns and hone in on the exact testing knowledge you're looking for.

GuessTheTest aims to connect, educate, and inspire experimenters, and optimizers, like you, with outstanding content.

We are a welcoming, collaborative community interested in implementing and sharing knowledge and best practices to propel the industry ahead.

We are also an unbiased resource. We strive to report A/B test case study results in an objective manner.

Most case studies are run externally, by companies who submit their tests to be published. Only case studies that demonstrate rigorous adherence to proper statistical measures and valid testing practices are published.

GuessTheTest is also platform-agnostic. We do not endorse any specific tools or software. Rather, we appreciate all resources available and work to provide you with the best information possible to optimize your success.