Optimizely vs VWO

VWO is used by more websites in our catalog: 1,701 use Optimizely and 5,538 use VWO.

Optimizely sites have the higher median Ahrefs Domain Rating (Optimizely: 54, VWO: 50).

Between 2026-06 and 2026-07, Optimizely went from 0.21% to 0.19% of all tracked sites, while VWO went from 0.83% to 0.63%. Optimizely is gaining ground faster in our index.

41 websites in our catalog use both Optimizely and VWO.

Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.