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KeyCloak

User ManagementMay 6, 2025

Alternative to ClerkClerk, Auth0Auth0

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Open Source Identity and Access Management for Modern Applications and Services

Information

License: Apache-2.0 license

27k stars

Key Features of Keycloak

  • Single Sign-On (SSO)
    Authenticate once and access multiple applications without needing to log in again.

  • Single Logout
    Log out once to end sessions across all connected applications.

  • User Federation
    Integrate with existing LDAP and Active Directory servers or custom user stores.

  • Identity Brokering
    Connect to external identity providers using OpenID Connect or SAML 2.0.

  • Social Login
    Enable login via social networks like Google, Facebook, GitHub, and more with minimal setup.

  • Admin Console
    Central interface for managing realms, users, roles, applications, and security policies.

  • Account Management Console
    Allows users to manage their own profiles, passwords, sessions, and identity provider links.

  • Authorization Services
    Implement fine-grained authorization beyond role-based access control.

  • Standards Support
    Built on industry standards: OpenID Connect, OAuth 2.0, and SAML 2.0.

  • Extensible Architecture
    Customize functionality through provider SPIs and themes.

  • Clustering and High Availability
    Designed to scale with clustering support for load balancing and failover.

  • Password Policies
    Enforce custom password rules for enhanced security.

  • Theme Customization
    Adapt login pages and console UIs to match your branding.

  • Lightweight Adapters
    Secure your applications with minimal configuration using Keycloak’s adapters.

  • High Performance
    Optimized for speed and scalability in demanding environments.

Open Source Identity and Access Management for Modern Applications and Services

In today’s digital landscape, identity and access management (IAM) is more than just a backend necessity—it's a cornerstone of security and user experience. Whether you're building customer-facing applications or securing internal services, you need a robust, flexible, and scalable solution. That’s where Keycloak steps in.

Built as an open-source IAM platform, Keycloak simplifies the hard parts of authentication and authorization. Developers no longer need to manage user storage or implement custom login flows for every application. Instead, Keycloak provides a centralized, secure, and extensible system out of the box.

Effortless Authentication and Single Sign-On

With Keycloak, your applications can offload login and logout operations to a central service. Once a user is authenticated with Keycloak, they can seamlessly access other applications without needing to log in again. This single sign-on (SSO) capability also extends to logout: sign out once and you're signed out everywhere.

This unified experience enhances both usability and security, making it a compelling choice for organizations managing multiple applications.

Social Login and Identity Brokering Made Easy

Adding social login—like Google, Facebook, or GitHub—is as simple as a few clicks in the admin console. Keycloak handles the integration, so you don’t have to write custom code or change your application logic.

Beyond social providers, Keycloak supports brokering with external OpenID Connect and SAML 2.0 identity providers. Whether you need to integrate with enterprise identity systems or third-party services, configuration is straightforward through the UI.

Federate Your Existing User Stores

Already have an LDAP or Active Directory setup? Keycloak can plug into existing user directories with ease. If you maintain users in a custom database or another proprietary system, you can even implement a custom provider to federate those accounts.

This means you don't need to migrate users or compromise on existing systems—Keycloak works with what you already have.

Centralized Administration and User Self-Service

Administrators have full control through the Keycloak Admin Console. From managing users and permissions to configuring applications and defining detailed authorization policies, everything is available in one place.

On the user side, the Account Management Console empowers users to update their profiles, manage passwords, enable two-factor authentication, and link accounts from other providers. This balance between centralized oversight and user autonomy creates a powerful and flexible user management ecosystem.

Standards-Based and Extensible

Keycloak is built on standard protocols—OpenID Connect, OAuth 2.0, and SAML—ensuring broad compatibility across platforms and services. Its architecture supports high performance and scalability, with features like clustering and lightweight adapters for securing your applications quickly.

Customization is another strength. Keycloak allows you to tailor password policies, integrate custom themes for branding, and extend functionality through code when needed.

More Than Role-Based Access

For applications that require more nuanced control than simple roles, Keycloak offers fine-grained authorization services. Define detailed policies and manage service-level permissions directly through the admin console, enabling rich, context-aware access controls.

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