Certainly vs Internet2

Internet2 is used by more websites in our catalog: 776 use Certainly and 978 use Internet2.

Internet2 sites have the higher median Ahrefs Domain Rating (Certainly: 63, Internet2: 76).

Between 2026-06 and 2026-07, Certainly went from 0.12% to 0.09% of all tracked sites, while Internet2 went from 0.16% to 0.11%. Certainly is gaining ground faster in our index.

No. A site runs a single SSL certificate authority, so Certainly and Internet2 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.