# Firebase Auth: what AI models say (September 2026)

Source: Memetik Index, https://www.memetik.ai/vendors/firebase-auth
Website: https://firebase.google.com

Firebase Auth was named in 21 of 50 AI answers across 1 category. Best position: Authentication for developers, 42% answer share, ranked #5, named first in 2%.

## What Firebase Auth is

Firebase Auth is a service that authenticates users in apps. It is for app teams that need to identify users and manage sign-in.

It provides backend services, SDKs and UI libraries for authentication. Apps can support passwords, phone numbers and federated identity providers, and connect authentication with other Firebase services using OAuth 2.0 and OpenID Connect. An optional Identity Platform upgrade adds multi-factor authentication, logging, SAML, OpenID Connect and multi-tenancy.

Pricing: The Identity Platform upgrade limits no-cost projects to 3,000 daily active users and charges pay-as-you-go projects for usage beyond 50,000 monthly active users.
(From Firebase Auth's own website, read 2026-09-02.)

## By category

| Category | Rank | Answer share | Named first | Models |
|---|---|---|---|---|
| Authentication for developers (https://www.memetik.ai/index/developer-auth) | #5 of 17 | 42% | 2% | GPT-5.6 Sol, ChatGPT, GPT-5.6 Luna, Claude Opus 5, Claude, Claude Fable 5, Gemini, Gemini 3.5 Flash, Perplexity, Sonar Reasoning Pro |

## What the models said

> "Choose Firebase Auth if speed and simplicity matter most and your app is mobile-first or already inside the Google ecosystem."
> — Perplexity, Authentication for developers

> "Startup authentication platforms compared For most startups, the strongest shortlist is Clerk, Supabase Auth, Auth0, and Firebase Authentication."
> — GPT-5.6 Luna, Authentication for developers

> "Supabase Auth Part of the Supabase open-source Firebase alternative."
> — Claude, Authentication for developers

> "Supabase Auth Supabase is an open-source Firebase alternative."
> — Gemini 3.5 Flash, Authentication for developers