Best Open Source Authentication & SSO Providers using Lucide Icons in 2026

Better Auth

Framework-agnostic authentication for TypeScript applications

Stars
27,928
Forks
2,473
Last commit
5 hours ago

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:

Clerk

Zitadel

Secure, customizable identity infrastructure for developers

Stars
13,598
Forks
1,038
Last commit
9 hours ago

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

Open Source Alternative to:

Supabase

Stack Auth

Open-source authentication and user management platform

Stars
6,763
Forks
513
Last commit
4 hours ago

Stack Auth provides secure authentication, authorization, and user management for developers in just 5 minutes.

Open Source Alternative to:

Clerk

Tesseral

Enterprise-ready B2B auth and user management in minutes

Stars
1,124
Forks
51
Last commit
2 months ago

Complete B2B authentication solution with SSO, role management, API security, and pre-built UI components. Ship enterprise-grade auth in just a few lines of code.

Open Source Alternative to:

Clerk

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Better Auth

Framework-agnostic authentication for TypeScript applications

Stars
27,928
Forks
2,473
Last commit
5 hours ago

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:

Clerk

Zitadel

Secure, customizable identity infrastructure for developers

Stars
13,598
Forks
1,038
Last commit
9 hours ago

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

Open Source Alternative to:

Supabase

Stack Auth

Open-source authentication and user management platform

Stars
6,763
Forks
513
Last commit
4 hours ago

Stack Auth provides secure authentication, authorization, and user management for developers in just 5 minutes.

Open Source Alternative to:

Clerk

Tesseral

Enterprise-ready B2B auth and user management in minutes

Stars
1,124
Forks
51
Last commit
2 months ago

Complete B2B authentication solution with SSO, role management, API security, and pre-built UI components. Ship enterprise-grade auth in just a few lines of code.

Open Source Alternative to:

Clerk

Open Source Authentication & SSO Providers using Lucide Icons

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