Nubus is described as 'Modular open-source solution for centralized identity & access management, providing secure user management, role-based access control, and Single Sign-On (SSO) via a central web portal' and is a identity management tool in the development category. There are more than 25 alternatives to Nubus for a variety of platforms, including Self-Hosted, Web-based, SaaS, Linux and Mac apps. The best Nubus alternative is Keycloak, which is both free and Open Source. Other great apps like Nubus are ZITADEL , authentik, Authelia and Hanko.