Test Spy is a free Chrome add-on developed by TestSpy that allows users to easily identify and analyze A/B tests and personalization campaigns running on a webpage. With Test Spy, users can gain insights into their competitors' A/B testing strategies or quality-assure their own campaigns.

This add-on provides a simple and straightforward way to view a list of live experiments from popular A/B testing platforms such as Optimizely or Google Optimize. By clicking on the Test Spy icon in the Chrome toolbar, users can instantly access a summary of ongoing experiments on the webpage they are visiting.

Test Spy is a valuable tool for marketers, developers, and anyone involved in A/B testing and personalization campaigns. It helps users stay informed about the latest trends and strategies in the industry, enabling them to make data-driven decisions and optimize their own campaigns.

Please note that Test Spy currently supports Optimizely and Google Optimize, with Adobe Test & Target support coming soon.