Open Source Alternatives to Clerk

Hanko

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.

Authentik

Unknown

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

Authgear

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.

Better Auth

MIT

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

Logto

MPL-2.0

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

Ory

Apache-2.0

Ory is a certified and battle-tested identity solution backed by a large open source community and trusted by Fortune 500 companies.

Stack Auth

Unknown

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

SuperTokens

Unknown

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

Tesseral

MIT

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.

Zitadel

AGPL-3.0

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