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Open Source Authentication & SSO Providers using CSS

A curated collection of the best open source platforms providing authentication, Single Sign-On (SSO), and user management. using CSS.

Hanko

Passkeys, SSO, and MFA without vendor lock-in

  • Stars

    9,043

  • Last commit

    22 hours ago

  • License

    Unknown
Open source authentication platform supporting passkeys, 2FA, SSO, and social login. Self-host or use Hanko Cloud, with full control over your data and no lock-in.

Open Source Alternative to:

Auth0

Keycloak

Secure authentication and access control made simple

  • Stars

    37,441

  • Last commit

    7 hours ago

  • License

    Apache-2.0
Comprehensive open source identity management solution offering single sign-on, social login, and fine-grained authorization for applications and services.

Open Source Alternative to:

Auth0

Better Auth

Framework-agnostic authentication for TypeScript applications

  • Stars

    30,385

  • Last commit

    8 hours ago

  • License

    MIT
A comprehensive authentication framework offering email/password, social sign-on, two-factor auth, and multi-tenant support with full TypeScript integration.

Open Source Alternative to:

Auth0

JumpServer

Secure access management for modern IT infrastructure

  • Stars

    31,803

  • Last commit

    6 hours ago

  • License

    GPL-3.0
Open-source privileged access management solution offering secure, browser-based access to SSH, RDP, Kubernetes, databases and remote applications.

Open Source Alternative to:

Teleport

Authentik

Take control of your identity with a secure, flexible solution

  • Stars

    26,017

  • Last commit

    7 hours ago

  • License

    MIT
authentik is an open-source identity provider that offers self-hosted authentication, authorization, and user management for businesses of all sizes.

Open Source Alternative to:

Auth0

Zitadel

Secure, customizable identity infrastructure for developers

  • Stars

    15,353

  • Last commit

    1 day ago

  • License

    AGPL-3.0
ZITADEL provides a comprehensive identity management solution with easy APIs, customizable workflows, and serverless deployment options.

Open Source Alternative to:

Supabase

Logto

Secure, seamless authentication for modern applications

  • Stars

    14,728

  • Last commit

    6 hours ago

  • License

    MPL-2.0
An open-source identity solution offering customizable login experiences, multi-tenant support, and comprehensive user management.

Open Source Alternative to:

Auth0

SuperTokens

Secure, customizable authentication for your applications

  • Stars

    15,349

  • Last commit

    7 hours ago

  • License

    Unknown
Open-source authentication solution offering flexible, self-hosted user management with advanced features and easy integration.

Open Source Alternative to:

Auth0

Pocket ID

Passwordless OIDC provider built for self-hosters

  • Stars

    Stars growing over the last 30 days9,640

  • Last commit

    17 hours ago

  • License

    BSD-2-Clause
Self-hostable OpenID Connect and OAuth 2.0 provider that lets users sign in to any OIDC-compatible app using passkeys instead of passwords.

Open Source Alternative to:

Auth0

Hexclave

Modular auth, payments, emails, and analytics for your product

  • Stars

    6,875

  • Last commit

    15 hours ago

  • License

    Unknown
Self-hostable platform combining user auth, payments, email, and analytics into modular building blocks that fit around your existing product.

Open Source Alternative to:

Auth0

Authgear

Managed identity and access management for any app

  • Stars

    2,119

  • Last commit

    2 days ago

  • License

    Apache-2.0
Authgear is a managed IAM platform handling authentication, SSO, and user management for B2C and B2B apps, with biometrics, MFA, and zero-trust support.

Open Source Alternative to:

Auth0
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