---
lang: en
title: "Google Firebase Authentication vs Supabase Identity & Authentication"
canonical: "https://saasspecs.com/firebase-vs-supabase/"
hvce_version: 1
tenant: saasspecs
slug: firebase-vs-supabase
record_kind: comparison
content_sha256: f6c3f4eb1a45d742bc1a352b5912eb168a68c35c40af1158bad00f1f100be9a0
indexed_at: "2026-06-15T06:32:32.875Z"
license: citation-free
entities:
  -
    role: a
    slug: firebase
    name: Google Firebase Authentication
    type: Thing
    profile_url: "https://saasspecs.com/item/firebase/?format=md"
  -
    role: b
    slug: supabase
    name: "Supabase Identity & Authentication"
    type: Thing
    profile_url: "https://saasspecs.com/item/supabase/?format=md"
---
# Google Firebase Authentication vs Supabase Identity & Authentication

## Pair

- **A**: Google Firebase Authentication
- **B**: Supabase Identity & Authentication

## Entity A

- **Title**: [Google Firebase Authentication](https://saasspecs.com/item/firebase/?format=md)
- **Schema type**: Corporation
- **Website**: https://firebase.google.com
- **Email**: support@google.com
- **Address**: 1600 Amphitheatre Parkway, Mountain View, California, 94043, United States
- **Coordinates**: 37.422, -122.0841
- **Deployment Link**: [Deploy Google Firebase Authentication Stack Layer](https://firebase.google.com/affiliate-placeholder)

### Summary

Google's ubiquitous, globally distributed cloud infrastructure identity layer optimized for massive app routing.

### Description

Firebase Authentication provides a core backend service toolkit designed to authenticate users via client-side libraries. Backed completely by Google Cloud Infrastructure, it handles extreme scale seamlessly for mobile and web systems alike.

### Attributes

- **Free Tier Allowance**: 50,000 MAU
- **Rate Limit Cap**: 6,000 RPM
- **Session Lifetime**: 1 Hours
- **Overage Fee per 1k MAU**: $0
- **MFA Support**: SMS Phone Verification exclusively on upgraded infrastructure tiers
- **Enterprise SSO SAML**: Supported through Google Cloud Identity Platform integration layer
- **Custom Domain Support**: Included naturally through standard Firebase Hosting custom routes
- **Supported SDKs**: Android, iOS, C++, Unity, Web JS, Node.js, Python, Go, Java
- **Social Providers**: Google, Facebook, GitHub, Twitter, Yahoo, Microsoft, Apple
- **Compliance Standards**: SOC1/2/3, ISO 27001, ISO 27017, HIPAA Compliant, GDPR Compliant
- **Webhook Fallback Policy**: Custom event handling configured via Cloud Functions background retry logic

## Entity B

- **Title**: [Supabase Identity & Authentication](https://saasspecs.com/item/supabase/?format=md)
- **Schema type**: Corporation
- **Website**: https://supabase.com
- **Email**: support@supabase.io
- **Address**: 85 Harrison St, San Francisco, California, 94105, United States
- **Coordinates**: 37.7833, -122.3999
- **Deployment Link**: [Deploy Supabase Identity & Authentication Stack Layer](https://partner.supabase.com/your-affiliate-id)

### Summary

An open-source Firebase alternative utilizing a highly scalable PostgreSQL metadata engine.

### Description

Supabase Auth provides a robust authentication layer built on GoTrue. It scales smoothly up to high-volume user tiers without custom backend code infrastructure.

### Attributes

- **Free Tier Allowance**: 50,000 MAU
- **Rate Limit Cap**: 10,000 RPM
- **Session Lifetime**: 24 Hours
- **Overage Fee per 1k MAU**: $0
- **MFA Support**: TOTP, WebAuthn, Phone SMS
- **Enterprise SSO SAML**: Available on Pro & Enterprise tiers via custom identity mapping
- **Custom Domain Support**: Available on Pro Tier ($20/mo) with full SSL configuration
- **Supported SDKs**: Next.js, React, Vue, Svelte, Node, Python, Go, Flutter, Swift
- **Social Providers**: Google, GitHub, Apple, Discord, GitLab, Bitbucket, Twitter
- **Compliance Standards**: SOC2 Type II, GDPR, HIPAA Compliant (with BAA agreement)
- **Webhook Fallback Policy**: Exponential backoff up to 24 hours with automatic failure truncation

## Facts (machine-readable)

| axis | unit | a_value | b_value | a_display | b_display |
| --- | --- | --- | --- | --- | --- |
| Free Tier Allowance | MAU | 50000 | 50000 | 50,000 MAU | 50,000 MAU |
| Rate Limit Cap | RPM | 6000 | 10000 | 6,000 RPM | 10,000 RPM |
| Session Lifetime | Hours | 1 | 24 | 1 Hours | 24 Hours |
| Overage Fee per 1k MAU | USD | 0.005 | 0.003 | 0.01 USD | 0 USD |

## Metrics

- **Free Tier Allowance**: 50,000 MAU / 50,000 MAU
- **Rate Limit Cap**: 6,000 RPM / 10,000 RPM
- **Session Lifetime**: 1 Hours / 24 Hours
- **Overage Fee per 1k MAU**: 0.01 USD / 0 USD

## Comparison context

This comparison covers the following catalog entities:

- [Google Firebase Authentication](https://saasspecs.com/item/firebase/?format=md) (a)
- [Supabase Identity & Authentication](https://saasspecs.com/item/supabase/?format=md) (b)