Choose Convert Experiences if you run tests for several clients, or for an online store of your own. Choose Optimizely if you run a continuous testing program and want recommendations, search ranking and content management beside it. Convert sells paid plans on monthly billing, and its higher plans come by quote.
An agency running tests for several clients wants results that flow into whatever analytics each client already uses. Convert Experiences sends variant assignments to Google's analytics product and other analytics tools, which leaves the analytics stack as it was. It also adds heatmaps and session replays that flag friction, to help diagnose a test while it runs. One limit is that its plans are measured by tested users each month, with extra volume added in blocks.
Teams with a data warehouse already in place can have Optimizely compute experiment results there, instead of in a separate copy. Its personalization side adds product recommendations and personalized search ranking for online stores. A content management system sits on the same platform, where marketing and product staff share pages and tests. Optimizely is aimed at continuous testing programs rather than the occasional experiment.
In reviews from 2021, Convert Experiences users praise its easy, simple setup and intuitive analytics. They also describe good value on price compared with competing testing tools. Optimizely's reviewers from 2015 to 2025 like how quickly support resolves simple problems by phone or email. They also report that support turns slow or unhelpful after a contract is signed, with staff turnover and multi-day waits for email replies.
Convert describes an online grooming store that worked with an agency partner to test a lightbox helping shoppers choose, plus a simpler scent summary to ease picking a scent. On both desktop and mobile, the store saw more finished orders and higher revenue per visitor. Optimizely tells of a direct-to-consumer oral care company that let non-technical teams launch and validate their own tests, and several ran at once. A refill quantity variant converted significantly better, with more units per transaction and more subscription units.