CAS Alternatives

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.

CAS iconCAS
  5
  • Free • Open Source
  • ...

Apereo CAS - Enterprise Single Sign On for the Web.

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CAS alternatives page was last updated Apr 12, 2025
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Alternatives
  1. Keycloak icon

    Keycloak

     22 likes
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    Open Source Identity and Access Management for modern Applications and Services.

    86 Keycloak alternatives

    License model

    • Free • Open Source

    Application type

    Country of Origin

    • US flagUnited States

    Platforms

    • Linux
    • Self-Hosted
    End result log-in page. Optionally, the feel and look of this page can be customized to your liking.

    Keycloak Features

    1.  Two-factor Authentication
    2.  Single Sign-On
    3.  SAML Single Sign-On
    4.  Multi-Factor Authentication (MFA)
    5.  Federated
    6.  Access Control

    Keycloak VS CAS

     

    • Keycloak is the most popular Linux & Self-Hosted alternative to CAS.

    • Keycloak is the most popular Open Source & free alternative to CAS.

    • Keycloak is Free and Open SourceCAS is also Free and Open Source
  2. authentik icon

    authentik

     9 likes
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    authentik is an open-source identity provider focused on flexibility and versatility.

    43 authentik alternatives

    License model

    • Free • Open Source

    Application type

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Self-Hosted
    • Mac
    • Linux
    • Docker
    • Kubernetes
    • AWS CloudFormation
    authentik screenshot 1

    Properties

    1.  Privacy focused

    Features

    1.  Two-factor Authentication
    2.  Self-hosted
    3.  Access Control
    4.  LDAP support
    5.  Single Sign-On

    authentik VS CAS

     

    • authentik is the most popular Mac alternative to CAS.

    • authentik is Free and Open SourceCAS is also Free and Open Source
    • authentik is Privacy focusedCAS is not according to our users
  4. LemonLDAP::NG icon

    LemonLDAP::NG

     16 likes
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    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.

    18 LemonLDAP::NG alternatives

    License model

    • Free • Open Source

    Application type

    Country of Origin

    • FR flagFrance
    • European Union flagEU

    Platforms

    • Windows
    • Linux
    • Self-Hosted
    LemonLDAP::NG screenshot 1

    LemonLDAP::NG Features

    1.  Two-factor Authentication
    2.  Access Control
    3.  SAML Single Sign-On
    4.  Single Sign-On
    5.  OpenID Connect
    6. Docker icon  Support for Docker
    7.  Dockerized
    8.  OpenID Provider

    LemonLDAP::NG VS CAS

     

    • LemonLDAP::NG is the most popular Windows alternative to CAS.

    • LemonLDAP::NG is Free and Open SourceCAS is also Free and Open Source
  5. AWS Identity and Access Management icon

    AWS Identity and Access Management

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    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.

    64 AWS Identity and Access Management alternatives

    License model

    • Free • Proprietary

    Application type

    Country of Origin

    • US flagUnited States

    Platforms

    • Software as a Service (SaaS)
    • Amazon Web Services
    AWS Identity and Access Management screenshot 1

    AWS Identity and Access Management VS CAS

     

    • AWS Identity and Access Management is the most popular SaaS alternative to CAS.

    • AWS Identity and Access Management is Free and ProprietaryCAS is Free and Open Source
  6. Tinyauth icon

    Tinyauth

     1 like
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    The simplest way to protect your apps with a login screen.

    43 Tinyauth alternatives

    License model

    • Free • Open Source

    Country of Origin

    • GR flagGreece
    • European Union flagEU

    Platforms

    • Self-Hosted
    • NGINX
    • Docker
    Tinyauth screenshot 1

    Tinyauth Features

    1.  React
    2. Docker icon  Support for Docker
    3.  Golang

    Tinyauth VS CAS

     
  7. FreeIPA icon

    FreeIPA

     13 likes
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    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.

    19 FreeIPA alternatives

    License model

    • Free • Open Source

    Country of Origin

    • US flagUnited States

    Platforms

    • Linux
    Using the authconfig utility to configure LDAP and Kerberos

    FreeIPA Features

    1.  DNS Server
    2.  LDAP Services
    3.  Kerberos
    4.  Web interface

    FreeIPA VS CAS

     
  9. Gluu Server icon

    Gluu Server

     3 likes
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    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...

    41 Gluu Server alternatives

    License model

    • Freemium • Open Source

    Application type

    Country of Origin

    • US flagUnited States

    Platforms

    • Online
    • Self-Hosted

    Gluu Server Features

    1.  Two-factor Authentication

    Gluu Server VS CAS

     

    • Gluu Server is the most popular Web-based alternative to CAS.

    • Gluu Server is Freemium and Open SourceCAS is Free and Open Source
  10. Shibboleth icon

    Shibboleth

     8 likes
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    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.

    11 Shibboleth alternatives

    License model

    • Free • Open Source

    Country of Origin

    • US flagUnited States

    Platforms

    • Windows
    • Linux
    • Self-Hosted

    Shibboleth Features

    1.  Single Sign-On
    2.  Federated

    Shibboleth VS CAS

     
  11. Ory icon

    Ory

     6 likes
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    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.

    55 Ory alternatives

    License model

    • Freemium • Open Source

    Application type

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Software as a Service (SaaS)
    • Online
    • Windows
    • Android
    • Mac
    • Linux
    • iPhone
    • Self-Hosted
    • iPad

    Properties

    1.  Privacy focused

    Features

    1.  Access Control
    2.  User Management
    3.  OpenID Provider
    4.  Two-factor Authentication
    5.  Multi-cloud access control
    6.  OpenID Connect
    7.  Ad-free
    8.  Dark Mode
    9.  Biometric Authentication
    10.  Single Sign-On

    Ory VS CAS

     

    • Ory is the most popular Android, iPhone & iPad alternative to CAS.

    • Ory is Freemium and Open SourceCAS is Free and Open Source
    • Ory is Privacy focusedCAS is not according to our users
  12. OpenAM icon

    OpenAM

     2 likes
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    OpenAM provides open source authentication, authorization, entitlement and federation software. Through OpenAM, the community actively continues development of OpenSSO.

    20 OpenAM alternatives

    License model

    • Free • Proprietary

    Platforms

    • Windows
    • Linux
    • BSD

    OpenAM Features

    1.  Access Control
    2.  Single Sign-On

    OpenAM VS CAS

     
  13. Connect2id Server icon

    Connect2id Server

     2 likes
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    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.

    14 Connect2id Server alternatives

    License model

    Country of Origin

    • GB flagUnited Kingdom

    Platforms

    • Online
    • Self-Hosted

    Connect2id Server Features

    1.  Single Sign-On
    2.  Federation

    Connect2id Server VS CAS

     

    • Connect2id Server is the most popular commercial alternative to CAS.

    • Connect2id Server is Paid and ProprietaryCAS is Free and Open Source
  14. SimpleSAMLphp icon

    SimpleSAMLphp

     1 like
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    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).

    9 SimpleSAMLphp alternatives

    License model

    • Free • Open Source

    Country of Origin

    • NO flagNorway

    Platforms

    • Self-Hosted
    Installation page
    Status page demo example

    SimpleSAMLphp Features

    1.  Single Sign-On

    SimpleSAMLphp VS CAS

     
12 of 16 CAS alternatives