Browse Open Source Alternatives to Auth0

Open source authentication providers give you full control over your authentication without relying on proprietary SaaS platforms. Below is a list of open source authentication providers that you can customize and manage yourself.

Better Auth

Full-featured TypeScript authentication in minutes

Open Source

Comprehensive TypeScript authentication framework with email/password, OAuth, 2FA, multi-tenant support, and framework-agnostic design for modern apps.

ZITADEL

Complete identity infrastructure for modern applications

Open Source

Multi-tenant, API-first identity platform with comprehensive SDKs, authentication, authorization, and extensibility features for developers and enterprises.

Tesseral

Complete B2B authentication solution in minutes

Open Source

Open source authentication platform for B2B apps with pre-built UI, enterprise SSO, fine-grained permissions, and API key management. Deploy in minutes.

Casdoor

Open-source IAM platform with comprehensive SSO support

Open Source

UI-first Identity and Access Management platform supporting OAuth 2.0, OIDC, SAML, WebAuthn, MFA, and integration with Google Workspace, Active Directory.

Keycloak

Secure apps with open source identity management

Open Source

Open source identity and access management solution with single sign-on, social login, user federation, and fine-grained authorization for applications.

authentik

Unified authentication platform you control

Open Source

Self-hosted identity provider with flexible workflows, comprehensive APIs, and enterprise-grade security. Over 1 million installations trusted worldwide.

Stack Auth

Open-source authentication platform for developers

Open Source

Complete authentication solution with login pages, user management, OAuth, RBAC, and team features. Open-source alternative to Auth0 and Clerk.

Hanko

Modern authentication with passkeys, 2FA, and SSO

Open Source

Open-source authentication platform offering passwordless login with passkeys, traditional passwords, 2FA, and SSO. Integrate secure user management in minutes.

SuperTokens

Build fast, maintain control, reduce authentication costs

Open Source

Open source user authentication solution with prebuilt UI, custom password policies, session management, and hosted on your domain. Setup in 5 minutes.

Auth.js

Secure authentication for modern web applications

Open Source

Free, open-source authentication library supporting multiple frameworks like Next.js, SvelteKit, Express, and Qwik with 50+ OAuth providers.

Supabase Auth

Complete user management with social logins built-in

Open Source

Built-in authentication system with social providers, PostgreSQL policies, and user management. No external services needed - own your data completely.

Browse Open Source Alternatives to Auth0

Open source authentication providers give you full control over your authentication without relying on proprietary SaaS platforms. Below is a list of open source authentication providers that you can customize and manage yourself.

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