Okta Auth0 Enterprise Identity vs Google Firebase Authentication Auth

Okta Auth0 Enterprise Identity vs Google Firebase Authentication Specs
Deploy Auth0 Architecture
👉 7,500 Free MAU • Enterprise-Grade Security Box
Deploy Firebase Backend
👉 50,000 Free MAU • Realtime NoSQL Included

Okta Auth0 Enterprise Identity

MFA Support
Guardian App, SMS, TOTP, WebAuthn, FIDO2, Push Notifications
Enterprise SSO SAML
Natively supports Okta, Azure AD, Ping, SAML2, OIDC Federation
Custom Domain Support
Available exclusively on Paid Tiers starting at standard baseline rates
Supported SDKs
Next.js, Angular, React, Vue, Android, iOS, Python, Java, PHP, .NET
Social Providers
Over 30+ native options including Google, Apple, Facebook, Amazon
Compliance Standards
SOC2 Type II, ISO 27001, ISO 27018, HIPAA, GDPR, FedRAMP In-Process
Webhook Fallback Policy
Automated log streaming dropoff to AWS EventBridge or custom retries via Actions

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