Open source alternatives to Okta[012]

Keycloak

JAVA

Open Source Identity and Access Management For Modern Applications and Services

Better Auth

TYPESCRIPT

The authentication framework for TypeScript

Authentik

PYTHON

The authentication glue you need

Ory Hydra

GO

OpenID Certified™ OpenID Connect and OAuth Provider written in Go

SuperTokens

JAVA

Open source alternative to Auth0 / AWS Cognito / Firebase Auth

Zitadel

GO

Identity infrastructure, simplified for you.

Logto

TYPESCRIPT

Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

Hanko

GO

Authentication and user management for the passkey era

Permify

GO

An open-source authorization as a service inspired by Google Zanzibar, designed to build and manage fine-grained and scalable authorization systems for any application. — Permify is now part of FusionAuth

Cerbos

GO

Cerbos is the open core, language-agnostic, scalable authorization solution that makes user permissions and authorization simple to implement and manage by writing context-aware access control policies for your application resources.

Defguard

RUST

Zero-Trust access management with true WireGuard 2FA/MFA

Authgear

GO

Open source Auth0/Clerk/Firebase alternative. Passkeys, SSO, MFA, passwordless, biometric login. Self-hosted or cloud. Enterprise-ready for SaaS & mobile apps