Pomerium is described as 'Identity and context-aware proxy that enables secure access to applications without a client. Pomerium provides a standardized interface to add access control to applications regardless of whether the application itself has authorization or authentication baked-in' and is a identity management tool in the security & privacy category. There are more than 10 alternatives to Pomerium for a variety of platforms, including Self-Hosted, SaaS, Web-based, Linux and Mac apps. The best Pomerium alternative is Keycloak, which is both free and Open Source. Other great apps like Pomerium are Authelia, Auth0, Clerk Authentication and Octelium.