Doofinder vs Fast Simon

Doofinder is used by more websites in our catalog: 478 use Doofinder and 287 use Fast Simon.

Doofinder sites have the higher median Ahrefs Domain Rating (Doofinder: 27, Fast Simon: 14).

Between 2026-06 and 2026-07, Doofinder went from 0.07% to 0.05% of all tracked sites, while Fast Simon went from 0.01% to 0.03%. Fast Simon is gaining ground faster in our index.

0 websites in our catalog use both Doofinder and Fast Simon.

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.