Authress is described as 'IAM authorization as service. Protects service resource assets, helps to ensure user data privacy, and make any app enterprise-security level ready'. There are five alternatives to Authress for a variety of platforms, including Self-Hosted solutions, Windows, Linux, Online / Web-based and Windows Mobile. The best alternative is Keycloak, which is both free and Open Source. Other great apps like Authress are IdentityServer (Freemium, Open Source), authentik (Free, Open Source), TOTPRadius (Paid) and Meveto Inc (Free, Open Source).
An open-source, standards-compliant, and flexible OpenID Connect and OAuth 2.0 framework for ASP.NET Core. - Single sign-on for for applications - Supports applications developed for the web, mobile, desktops, devices, and more.
authentik is an open-source identity provider focused on flexibility and versatility. - Easy to Use: Identity made easy. authentik makes single-sign on (SSO), user enrollment, and access control simple.