Landing Page A/B Tests Made Simple. Launch Tests Faster, More Often and for Crazy Cheap With Thrive Optimize. Meet the WordPress A/B Testing Add-On for Thrive Architect Made Especially for Non-Techies. Thrive Optimize is the A/B testing plugin for WordPress that is defined by what it doesn’t do as much as by what it does that gives you the power to run fast and highly effective split tests for your landing pages — directly on your WordPress website.