Clerk vs Firebase Auth

Firebase Auth is used by more websites in our catalog: 333 use Clerk and 371 use Firebase Auth.

Firebase Auth sites have the higher median Ahrefs Domain Rating (Clerk: 27, Firebase Auth: 34).

Between 2026-06 and 2026-07, Clerk went from 0.05% to 0.04% of all tracked sites, while Firebase Auth went from 0.05% to 0.04%. Clerk is gaining ground faster in our index.

0 websites in our catalog use both Clerk and Firebase Auth.

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.