Permify is described as 'Open-source authorization service for creating and managing fine-grained permissions in your applications and services. Inspired by Google’s consistent, global authorization system, Google Zanzibar' and is an app. There are seven alternatives to Permify for a variety of platforms, including Self-Hosted, Linux, Web-based, Mac and Windows apps. The best Permify alternative is Keycloak, which is both free and Open Source. Other great apps like Permify are authentik, Tinyauth, IdentityServer and TOTPRadius.