Nelio AB Testing vs Optimizely

Optimizely is used by more websites in our catalog: 399 use Nelio AB Testing and 1,701 use Optimizely.

Optimizely sites have the higher median Ahrefs Domain Rating (Nelio AB Testing: 48, Optimizely: 54).

Between 2026-06 and 2026-07, Nelio AB Testing went from 0.06% to 0.05% of all tracked sites, while Optimizely went from 0.21% to 0.19%. Optimizely is gaining ground faster in our index.

0 websites in our catalog use both Nelio AB Testing and Optimizely.

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.