# Firebase Authentication: how AI models rank it, September 2026

IT AI Recommendation Index, September 2026 Edition. Named in 9 judge labels across 1 categories by 6 of 12 models. Page: https://it-ai-index.com/vendors/firebase-authentication/

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| Customer identity and access management | 2% | 12 | 33% | 9 |

## What the models said for it

- "Building an MVP / Prototype | Firebase Auth (Cheapest/Easiest)" (Qwen 3.7 Flash, CIAM)
- "Best for Google/mobile-first apps ... Cons: Limited passkeys/advanced CIAM" (Grok 4.1 Fast, CIAM)
- "Best for Mobile/Google Ecosystem: Firebase Authentication" (Kimi K2, CIAM)
- "(Best for Google Ecosystem) - Free tier: 50,000 MAUs" (MiniMax M2.5, CIAM)

## And against it

- "Unlike Firebase, which charges "per operation" (meaning a spike in read/write operations can trigger a surprise bill)" (Gemini 3.5 Flash, CIAM)
- "Cautiously use it only for basic consumer MVPs." (Gemini 3.5 Flash, CIAM)
- "Firebase/Cognito criticized for vendor lock-in." (Grok 4.1 Fast, CIAM)

## Record

- Method: https://it-ai-index.com/methodology/
- Raw judge labels and full responses: https://it-ai-index.com/data/
- License: CC BY 4.0. Cite as IT AI Recommendation Index, September 2026 Edition, it-ai-index.com.