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Open Source Keycloak Alternatives

The best open source alternative to Keycloak is FreeIPA. If that doesn't suit you, our users have ranked more than 25 alternatives to Keycloak and 18 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Keycloak are CAS, Pomerium, Ory and LemonLDAP::NG.

Keycloak alternatives are mainly Identity Management Tools but may also be Reverse Proxy Servers. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Keycloak.
This page was last updated May 2, 2022
Keycloak
  10
  • FreeOpen Source
  • Linux
  • Self-Hosted

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

Learn more about Keycloak

  1. FreeIPA

    • FreeOpen Source
    • Linux

    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.

  2. CAS

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Online
    • Self-Hosted

    Apereo CAS - Enterprise Single Sign On for the Web.



  3. Pomerium

    • Free PersonalOpen Source
    • Linux
    • Self-Hosted
    • Kubernetes
    • Docker

    Pomerium is an identity-aware proxy that enables secure access to internal applications. Pomerium provides a standardized interface to add access control to applications regardless of whether the application itself has authorization or authentication baked-in.

  4. Ory

    • 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.

  5. LemonLDAP::NG

    • FreeOpen Source
    • Windows
    • Linux
    • Self-Hosted

    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.



  6. Gluu Server

    • FreemiumOpen Source
    • Online
    • Self-Hosted

    The Gluu Server is a container distribution of free open source software (FOSS) for identity and access management (IAM).

    No screenshots yet
  7. Authelia

    • FreeOpen Source
    • Self-Hosted
    • Kubernetes
    • Docker

    uthelia is an open-source authentication and authorization server providing two-factor authentication and single sign-on (SSO) for your applications via a web portal.

  8. IdentityServer

    • FreemiumOpen Source
    • Self-Hosted
    • .NET Framework

    An open-source, standards-compliant, and flexible OpenID Connect and OAuth 2.0 framework for ASP.NET Core.

    No screenshots yet
  9. Frontegg

    • FreeOpen Source
    • Mac
    • Windows
    • Online
    • Software as a Service (SaaS)

    Frontegg is a developer platform that enables product-led-growth through a customer-facing user-management interface embedded seamlessly within any product.

  10. ZITADEL provides you with all the features necessary to build great solutions, without the need of building the login and access management yourself.

Showing 10 of 18 alternatives