
Description: IdentityServer is an open source OpenID Connect and OAuth 2.0 framework for ASP.NET Core used to enable single sign-on, API access control and user profile management. It supports token-based authentication and authorization for web sites, web APIs and native/mobile applications.
Type: Open Source Test Automation Framework
Founded: 2011
Primary Use: Mobile app testing automation
Supported Platforms: iOS, Android, Windows

Description: Keycloak is an open source identity and access management solution. It handles authentication, authorization, and user federation and makes it easy to secure applications and services. Keycloak provides out-of-the-box support for popular protocols like OpenID Connect, OAuth 2.0, and SAML 2.0.
Type: Cloud-based Test Automation Platform
Founded: 2015
Primary Use: Web, mobile, and API testing
Supported Platforms: Web, iOS, Android, API