CAS is described as 'Apereo CAS - Enterprise Single Sign On for the Web' and is an app in the network & admin category. There are more than 10 alternatives to CAS for a variety of platforms, including Self-Hosted, Linux, Web-based, Windows and SaaS apps. The best CAS alternative is Keycloak, which is both free and Open Source. Other great apps like CAS are authentik, LemonLDAP::NG, AWS Identity and Access Management and Tinyauth.
Open Source Identity and Access Management for modern Applications and Services.
Keycloak is the most popular Linux & Self-Hosted alternative to CAS.
Keycloak is the most popular Open Source & free alternative to CAS.
authentik is an open-source identity provider focused on flexibility and versatility.
authentik is the most popular Mac alternative to CAS.
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.
LemonLDAP::NG is the most popular Windows alternative to CAS.
With AWS Identity and Access Management (IAM), you can specify who or what can access services and resources in AWS, centrally manage fine-grained permissions, and analyze access to refine permissions across AWS.
AWS Identity and Access Management is the most popular SaaS alternative to CAS.
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.
The Gluu Server is a container distribution of free open source software (FOSS) for identity and access management (IAM). SaaS, custom, open source and commercial web and mobile applications can leverage a Gluu Server for user authentication, identity information, and policy...
Gluu Server is the most popular Web-based alternative to CAS.
The Shibboleth software implements widely used federated identity standards, principally the OASIS Security Assertion Markup Language (SAML), to provide a federated single sign-on and attribute exchange framework.
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 Network and get started in minutes.
Ory is the most popular Android, iPhone & iPad alternative to CAS.
OpenAM provides open source authentication, authorization, entitlement and federation software. Through OpenAM, the community actively continues development of OpenSSO.
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).
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.
Connect2id Server is the most popular commercial alternative to CAS.
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