Google Firebase Authentication vs Vercel Serverless Functions Compute

Google Firebase Authentication vs Vercel Serverless Functions Specs
  • Free Tier Allowance
  • Rate Limit Cap
  • Session Lifetime
  • Overage Fee per 1k MAU
Comparison chart between Google Firebase Authentication and Vercel Serverless Functions raw data
MetricGoogle Firebase AuthenticationVercel Serverless Functions
Free Tier Allowance50,000 MAU100,000 Requests/day
Rate Limit Cap6,000 RPM60 RPM
Session Lifetime1 Hours0.02 Hours
Overage Fee per 1k MAU$0$0
Deploy Firebase Backend
👉 50,000 Free MAU • Realtime NoSQL Included
Deploy Vercel Functions
👉 100k Free Requests/Day • Built for Next.js Optimized SSR
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
Vercel Serverless Functions
MFA Support:
Enforced via Vercel team SSO and Git provider-linked account security
Enterprise SSO SAML:
Available on Enterprise plans with SAML 2.0 directory federation
Custom Domain Support:
Included on all projects with automatic TLS certificate provisioning
Supported SDKs:
Node.js, Go, Python, Ruby, Edge Runtime, Next.js App Router
Social Providers:
GitHub, GitLab, Bitbucket OAuth for deploy and preview authentication
Compliance Standards:
SOC 2 Type II, GDPR, HIPAA available on Enterprise agreements
Webhook Fallback Policy:
Deploy hooks and integration logs with automatic retry on failed build webhooks
Google Firebase Authentication

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.

Vercel Serverless Functions
Co-locate API routes in the same Next.js app directory to minimize cold starts and leverage ISR for hybrid static + dynamic paths.