Skip to content
OpenAlternative

Open Source Auth0 Alternatives

A curated collection of the 13 best open source alternatives to Auth0.

The best open source alternative to Auth0 is Hanko. If that does not suit you, we have compiled a ranked list of other open source Auth0 alternatives to help you find a suitable replacement.

Auth0 alternatives are mainly Authentication & SSO. Browse these if you want a narrower list of alternatives or are looking for a specific functionality of Auth0.

Written by OpenAlternative Last updated: June 2, 2026
#1

Hanko

Open source authentication platform supporting passkeys, 2FA, SSO, and social login. Self-host or use Hanko Cloud, with full control over your data an

Open source authentication platform supporting passkeys, 2FA, SSO, and soc...

#2

Keycloak

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

Comprehensive open source identity management solution offering single sig...

#3

Better Auth

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

A comprehensive authentication framework offering email/password, social s...

#4

Authentik

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

authentik is an open-source identity provider that offers self-hosted auth...

#5

SuperTokens

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

Open-source authentication solution offering flexible, self-hosted user ma...

#6

Zitadel

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

ZITADEL provides a comprehensive identity management solution with easy AP...

#7

Ory

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

Ory is a certified and battle-tested identity solution backed by a large o...

#8

Logto

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

An open-source identity solution offering customizable login experiences, ...

#9

Stack Auth

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

Stack Auth provides secure authentication, authorization, and user managem...

#10

Permify

Open-source authorization service for implementing fine-grained access controls. Centralized, scalable solution supporting RBAC, ABAC and ReBAC with G

Open-source authorization service for implementing fine-grained access con...

#11

Cerbos

A scalable authorization layer that provides fine-grained access control through externalized policies, enabling secure and flexible permissions manag

A scalable authorization layer that provides fine-grained access control t...

#12

Authgear

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

Authgear is a managed IAM platform handling authentication, SSO, and user ...

#13

Tesseral

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

Complete B2B authentication solution with SSO, role management, API securi...