Clerk Premium User Management vs Google Firebase Authentication Auth

Clerk Premium User Management vs Google Firebase Authentication Specs
Deploy Clerk Layer
👉 10,000 Free MAU • Pre-Built Drop-in UI Components
Deploy Firebase Backend
👉 50,000 Free MAU • Realtime NoSQL Included

Clerk Premium User Management

MFA Support
SMS Codes, TOTP, Backup Codes
Enterprise SSO SAML
Supported natively on custom Enterprise deployment structures
Custom Domain Support
Included in Free Tier default allocation for primary production URLs
Supported SDKs
Next.js, React, Remix, Gatsby, Expo, Redwood, Node.js
Social Providers
Google, GitHub, Apple, Facebook, Discord, Twitter, LinkedIn
Compliance Standards
SOC2 Type II, GDPR, CCPA Compliant out of the box
Webhook Fallback Policy
Exponential retries across a 24-hour window powered by a Svix messaging layout

Google Firebase Authentication

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