What is the best alternative to Firebase Auth?

By number of websites, the most widely used alternatives to Firebase Auth are Clerk, Okta, Auth0. The right one depends on your needs; compare them on adoption, authority, and audience above.

How many alternatives to Firebase Auth are there?

Site Stats Database tracks 3 other authentication & identity platforms used by 100 or more websites, plus a long tail of rarer ones. Firebase Auth itself is used by 371 websites.

Which authentication / identity platform has the most websites?

Firebase Auth leads this category with 371 websites in our catalog.

Where does this data come from?

Adoption is counted from Site Stats Database's own crawl; authority (Ahrefs Domain Rating) and traffic come from Ahrefs and DataForSEO. Everything reflects the sites we track and refreshes at least monthly.

Firebase Auth Alternatives & Competitors

Last updated July 1, 2026 · refreshes automatically as new data lands.

Looking for an alternative to Firebase Auth? Site Stats Database tracks 3 other authentication & identity platforms; the top ones are below, ranked by adoption, with authority and traffic for each and the leading sites that use them. Firebase Auth itself is used by 371 websites. Back to Firebase Auth.

Authentication	Websites	Share	Median DR	Median traffic	Compare

Firebase Auth Alternatives & Competitors

The top Firebase Auth alternatives in depth

Clerk

Okta

Auth0

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