Marker.io vs Userback

Marker.io is used by more websites in our catalog: 434 use Marker.io and 168 use Userback.

Marker.io sites have the higher median Ahrefs Domain Rating (Marker.io: 47, Userback: 43).

Between 2026-06 and 2026-07, Marker.io went from 0.06% to 0.05% of all tracked sites, while Userback went from 0.02% to 0.02%. Userback is gaining ground faster in our index.

3 websites in our catalog use both Marker.io and Userback.

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.