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    CAS Alternatives

    CAS is described as 'provides enterprise single sign-on service:'. There are more than 10 alternatives to CAS for a variety of platforms, including Self-Hosted solutions, Linux, Windows, Online / Web-based and SaaS. The best alternative is Keycloak, which is both free and Open Source. Other great apps like CAS are FreeIPA (Free, Open Source), LemonLDAP::NG (Free, Open Source), Ory (Free, Open Source) and OpenAM (Free).

    This page was last updated Jul 16, 2021

    1. Open Source Identity and Access Management for modern Applications and Services.
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    2. FreeIPA is an integrated security information management solution combining Linux (Fedora), 389 Directory Server, MIT Kerberos, NTP, DNS, Dogtag (Certificate System). It consists of a web interface and command-line administration tools.


    3. LemonlLDAP::NG is a modular Web-SSO based on Apache::Session modules. It simplifies the build of a protected area with a few changes in the application. It manages both authentication and authorization and provides headers for accounting.
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      • FreeOpen Source
      • Mac
      • Windows
      • Linux
      • Online
      • Windows Mobile
      • Android
      • iPhone
      • Chrome OS
      • Windows Phone
      • iPad
      • Self-Hosted
      • Linux Mobile
      • Apple TV
      • Software as a Service (SaaS)
      Ory builds cloud-native authentication (login), authorization (permission), delegation (OAuth2, OpenID Connect), and user management software. You can deploy what you need yourself or use the Ory Cloud Platform and get started in minutes.
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      • FreeProprietary
      • Windows
      • Linux
      • BSD
      OpenAM provides open source authentication, authorization, entitlement and federation software. Through OpenAM, the community actively continues development of OpenSSO.
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    4. OpenID Connect / OAuth 2 server for single sign-on, identity provision and federation, and securing web APIs with access tokens. Supports profiles for fintech applications, eHealth, eGovernment and others.
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    5. The Gluu Server is a container distribution of free open source software (FOSS) for identity and access management (IAM).
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      • FreeOpen Source
      • Windows
      • Linux
      • Self-Hosted
      standards based, open source software for web single sign-on across or within organizational boundaries allowing sites to make informed authorization decisions for individual access of protected online resources in a privacy-preserving manner.
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    6. SimpleSAMLphp is an application written in native PHP that deals with authentication. The main focus of SimpleSAMLphp is providing support for SAML 2.0 as a Service Provider (SP) and SAML 2.0 as an Identity Provider (IdP).
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    7. 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.
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    Showing 10 of 13 alternatives