Open Source Identity and Access Management for modern Applications and Services.




Phase Two is described as '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' and is a identity management tool in the network & admin category. There are more than 25 alternatives to Phase Two, not only websites but also apps for a variety of platforms, including Self-Hosted, SaaS, Linux and Windows apps. The best Phase Two alternative is Keycloak, which is both free and Open Source. Other great sites and apps similar to Phase Two are VoidAuth, authentik, ZITADEL and Authelia.
Open Source Identity and Access Management for modern Applications and Services.




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.

authentik is an open-source identity provider focused on flexibility and versatility.




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.

Protect your applications with Single Sign-On and 2 Factor. Authelia is an open-source full-featured authentication server available on Github.



Microsoft Entra ID (formerly Azure Active Directory) is a comprehensive identity and access management cloud solution that provides a robust set of capabilities to manage users and groups.
Okta's Workforce and Customer Identity Clouds enable secure access, authentication, and automation—putting identity at the heart of business security and growth.



With AWS Identity and Access Management (IAM), you can specify who or what can access services and resources in AWS, centrally manage fine-grained permissions, and analyze access to refine permissions across AWS.

The Gluu Server is a container distribution of free open source software (FOSS) for identity and access management (IAM). SaaS, custom, open source and commercial web and mobile applications can leverage a Gluu Server for user authentication, identity information, and policy...
LemonlLDAP::NG is a modular Web-SSO based on Apache::Session modules. It simplifies the build of a protected area with a few changes in the application. It manages both authentication and authorization and provides headers for accounting.




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.




Logto helps you build the sign-in, auth, and user identity within minutes. We provide an OIDC-based identity service and the end-user experience with username, phone number, email, and social sign-in, for web and native apps.



