ui-dns.biz vs UltraDNS

UltraDNS is used by more websites in our catalog: 1,827 use ui-dns.biz and 2,243 use UltraDNS.

UltraDNS sites have the higher median Ahrefs Domain Rating (ui-dns.biz: 22, UltraDNS: 55).

Between 2026-06 and 2026-07, ui-dns.biz went from 0.23% to 0.21% of all tracked sites, while UltraDNS went from 0.32% to 0.25%. ui-dns.biz is gaining ground faster in our index.

No. A site runs a single DNS provider, so ui-dns.biz and UltraDNS are mutually exclusive.

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.