Glossary/Measurement & Attribution/Server-Side Testing
Measurement & Attribution
Server-Side Testing
Running experiments by assigning variants on the server before a page loads, avoiding flicker and enabling tests of pricing or algorithms.
By Brandon Mina·CEO, BrandPilot AI·Updated November 2026
Short answer
Server-side testing is running experiments by assigning users to variants on the server before a page or app screen loads, rather than altering the page in the browser. It avoids visual flicker and makes it possible to test deeper changes, such as pricing, search ranking or recommendation algorithms, though it usually requires engineering involvement.