Certum vs Cloudflare

Cloudflare is used by more websites in our catalog: 579 use Certum and 888 use Cloudflare.

Certum sites have the higher median Ahrefs Domain Rating (Certum: 55, Cloudflare: 27).

Between 2026-06 and 2026-07, Certum went from 0.08% to 0.07% of all tracked sites, while Cloudflare went from 0.12% to 0.10%. Certum is gaining ground faster in our index.

No. A site runs a single SSL certificate authority, so Certum and Cloudflare 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.