Nelio AB Testing vs VWO

VWO is used by more websites in our catalog: 399 use Nelio AB Testing and 5,538 use VWO.

VWO sites have the higher median Ahrefs Domain Rating (Nelio AB Testing: 48, VWO: 50).

Between 2026-06 and 2026-07, Nelio AB Testing went from 0.06% to 0.05% of all tracked sites, while VWO went from 0.83% to 0.63%. Nelio AB Testing is gaining ground faster in our index.

14 websites in our catalog use both Nelio AB Testing 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.