7 alternatives · Authentication & Identity
Best alternatives to Firebase Auth in 2026
Firebase Authentication is Google's managed authentication service, providing SDKs for web, iOS, Android, and server-side authentication. It supports email/password, phone number, Google, Facebook, GitHub, Apple, and other social providers. Authentication events integrate with Firebase security rules for Firestore and Firebase Storage, and with Google Cloud Identity Platform for enterprise features.
What is Firebase Auth?
Why look for Firebase Auth alternatives?
Firebase Auth is tightly coupled to the Firebase/Google ecosystem. Teams not using Firestore or other Firebase services find it adds unnecessary vendor dependency. The UI is not pre-built, requiring custom login form implementation. Enterprise features require upgrading to Google Cloud Identity Platform.
7 alternatives to Firebase Auth
Secure access for everyone. But not just anyone.
Auth0 is a flexible, drop-in authentication and authorization platform supporting social login, MFA, SSO, and enterprise identity providers. Now part of Okta, it is one of the most widely deployed auth solutions for web and mobile applications.
More than a login box. Complete user management.
Clerk provides pre-built UI components, APIs, and a dashboard for user authentication and management. It handles login, registration, user profiles, organizations, and session management with minimal setup, and is particularly popular with Next.js developers.
Open-source Firebase alternative with built-in auth.
Supabase Auth is the authentication layer built into Supabase, supporting email/password, magic links, social OAuth, phone OTP, and SSO. It integrates directly with Supabase's Postgres database and RLS policies for row-level security.
Authentication for Next.js.
NextAuth.js (now Auth.js) is an open-source authentication library for Next.js that handles OAuth, email/password, and magic link authentication with minimal configuration. It is self-hosted, stores sessions in your own database, and has zero per-user fees.
Identity for the internet. Secure every digital interaction.
Okta is the leading enterprise identity platform providing workforce and customer identity solutions. It covers SSO, MFA, lifecycle management, and advanced security policies for large organizations with complex compliance requirements.
Add enterprise features in minutes, not months.
WorkOS provides APIs for adding enterprise SSO (SAML), directory sync (SCIM), audit logs, and fine-grained authorization to SaaS products. It is designed for B2B SaaS companies that need to close enterprise deals requiring these compliance features.
The developer-first authentication platform.
Stytch is a developer-first authentication platform focused on passwordless login methods — magic links, one-time passcodes, biometrics, and passkeys. It offers both hosted UI and headless APIs for fully custom authentication experiences.
Know a great Firebase Auth alternative?
Submit your product to BuiltByMe and get discovered by people looking for exactly what you built.
Frequently asked
Is Firebase Auth free?
Firebase Authentication is free with no MAU limits for most auth methods. Phone authentication has a free quota of 10,000 verifications per month. Enterprise features via Cloud Identity Platform are priced separately.
Does Firebase Auth work outside of Firebase?
Yes. Firebase Auth can be used as a standalone authentication service even if you use a different database. However, you lose the tight integration with Firestore security rules that makes Firebase Auth most powerful.
How does Firebase Auth compare to Clerk?
Firebase Auth is free but requires you to build your own login UI. Clerk provides pre-built components and handles more of the user management surface. For React and Next.js projects, Clerk is generally faster to implement. Firebase Auth is better for cross-platform apps (iOS, Android) with existing Firebase infrastructure.
Can I migrate from Firebase Auth to another provider?
Migration is possible but requires careful handling. Firebase allows exporting user records including hashed passwords (using their specific bcrypt variant). Migrating to Auth0 or Supabase requires importing these records and updating your client SDK. Most teams plan this carefully before undertaking the migration.
Browse all Authentication & Identity tools
Discover more tools built by indie makers