The best free alternative to Okta is VoidAuth, which is also Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to Okta and loads of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to Okta are Keycloak, authentik, Authelia and ZITADEL .
Open-source authentication and user management platform offering passkey-based SSO, centralized login, user invitations, self-registration, and email integration for self-hosted deployments. Emphasizes privacy, admin and user ease, local data control, and strong security.
United States
Open Source Identity and Access Management for modern Applications and Services.
United States
authentik is an open-source identity provider focused on flexibility and versatility.
Germany
EU
Protect your applications with Single Sign-On and 2 Factor. Authelia is an open-source full-featured authentication server available on Github.
FranceEU
Secure authentication management for your application. Customize as you grow, with easy APIs and programmable workflows. Focus on growing, your login is in good hands.
Switzerland
AuthKit is a Radix-powered open source authentication UI built for effortless customizations. User Management is the backend platform handling email verification, account linking, bot blocking, organization modeling, and more.
United States
Hanko is a modern open source Authentication & User Management system – built and hosted in the EU. Alternative to Clerk, Auth0, Stytch, Descope.
GermanyEU
Stack is an open-source, self-hostable, and highly customizable authentication and user management system.
United States
Better Auth is a framework-agnostic authentication and authorization framework for TypeScript. It provides a comprehensive set of features out of the box and includes a plugin ecosystem that simplifies adding advanced functionalities.
You can connect any application (written in any language or on any stack) to Auth0 and define its Connection, the method used to authenticate the users of that application:
United States
Kanidm is an identity management server, acting as an authority on account information, authentication and authorisation within a technical environment.
Phase Two builds on top of Keycloak, one of the most widely used open source identity and access management systems in the world. Our extensions bring multi-tenancy, audit logging, a self-service admin portal, and more to enhance Keycloak for SaaS and on-premise use cases.
