Keycloak

Choosing an identity platform is a 5-year commitment. Switching costs are high — every application integration, every custom policy, and every user credential is tied to your IdP. Pick wrong and you’ll either overpay for years or hit scaling walls that require a painful re-platforming. This framework gives you a structured approach to the decision, based on factors that actually matter rather than vendor marketing. The Decision Matrix Score each platform 1-5 on these factors, weighted by your organization’s priorities: ...

Upgrading Keycloak across major versions is one of those tasks that looks simple on paper — download the new release, start it up, let Liquibase handle the database — but reliably creates production incidents when done without preparation. Between versions 21 and 26, Keycloak introduced several breaking changes that affect clustering, theming, SPIs, and configuration format. This guide covers what actually breaks at each version boundary and how to handle it. ...

Not every organization wants to move from ADFS to Microsoft Entra ID. Some want to stay vendor-neutral, keep identity infrastructure on-premises, or simply avoid per-user licensing costs. Keycloak fills that gap — it handles SAML 2.0, OIDC, and integrates directly with Active Directory via LDAP federation. The migration isn’t trivial, though. ADFS and Keycloak have different architectural models, and some ADFS features don’t have direct Keycloak equivalents. This guide covers the practical steps, common blockers, and configuration patterns you’ll need. ...

Custom authentication flows in Keycloak allow you to define unique login processes tailored to specific application needs. Whether you need multi-factor authentication, social logins, or custom policies, Keycloak provides the flexibility to create these journeys with ease. In this post, we’ll walk through building custom authentication flows, common pitfalls, and best practices to ensure your login processes are both secure and efficient. What is Keycloak Custom Authentication Flows? Custom authentication flows in Keycloak let you define unique login processes tailored to specific application needs. Instead of relying on the default flows, you can create flows that include additional steps, such as OTP verification, social logins, or custom policies. ...

Keycloak User Federation with LDAP and Active Directory allows you to leverage existing directory services for user management and authentication. This setup integrates seamlessly with Keycloak, enabling you to centralize user data and simplify identity management across your applications. What is Keycloak User Federation with LDAP and Active Directory? Keycloak User Federation with LDAP and Active Directory lets you connect your existing LDAP or Active Directory servers to Keycloak. This integration means that user data, including login credentials, roles, and attributes, is managed in your directory service, while Keycloak handles authentication and authorization for your applications. If you’re planning a broader migration from legacy LDAP to modern identity platforms, see our guide on LDAP Directory Modernization and Migration to Cloud Identity. ...

Keycloak High Availability involves setting up multiple Keycloak instances to ensure continuous availability and reliability of identity management services. This setup helps prevent downtime and ensures that your applications can continue to authenticate and authorize users even if one instance fails. If you are starting from scratch, the Keycloak Docker Compose Production Deployment guide covers the foundational single-node setup before you scale to a cluster. What is Keycloak Clustering? Keycloak clustering is the process of running multiple Keycloak servers that share the same configuration and data. This allows for load distribution, failover, and scalability. In a clustered setup, all nodes communicate with each other to keep their state synchronized. ...

Keycloak Custom Theme Development is the process of creating and applying custom themes to Keycloak’s login pages to match your brand identity. Whether you’re looking to enhance user experience or comply with corporate branding guidelines, custom themes are a powerful tool in your IAM toolkit. What is Keycloak? Keycloak is an open-source Identity and Access Management solution that provides a single sign-on (SSO) platform for web and mobile applications. It supports various authentication mechanisms, including OAuth 2.0, OpenID Connect, and SAML, making it a versatile choice for modern applications. ...

Setting up Identity and Access Management (IAM) can be daunting, especially when you’re dealing with multiple applications and users. Keycloak, an open-source IAM solution, simplifies this process by providing robust authentication and authorization capabilities. In this guide, I’ll walk you through the basics of getting started with Keycloak, covering everything from setting up your first realm to integrating it with your applications. Understanding the Problem Before diving into Keycloak, let’s understand why IAM is crucial. Imagine managing access to multiple applications across different teams. Without a centralized system, you’d need to handle user management, authentication, and authorization separately for each application. This leads to inconsistencies, security risks, and increased administrative overhead. Keycloak addresses these issues by providing a unified platform for managing identities and access. ...

Choosing the right Identity and Access Management (IAM) platform can make or break your project. I’ve worked with both Auth0 and Keycloak extensively, and I know firsthand how each handles different scenarios. This guide will help you decide which one fits your needs best. Visual Overview: sequenceDiagram participant User participant SP as Service Provider participant IdP as Identity Provider User->>SP: 1. Access Protected Resource SP->>User: 2. Redirect to IdP (SAML Request) User->>IdP: 3. SAML AuthnRequest IdP->>User: 4. Login Page User->>IdP: 5. Authenticate IdP->>User: 6. SAML Response (Assertion) User->>SP: 7. POST SAML Response SP->>SP: 8. Validate Assertion SP->>User: 9. Grant Access The Problem You need a robust IAM solution that scales with your business. You want something that simplifies user management, secures your applications, and integrates seamlessly with your tech stack. But with options like Auth0 and Keycloak, it’s hard to know which one to pick. Let’s dive into the details. ...

Visual Overview: sequenceDiagram participant User participant SP as Service Provider participant IdP as Identity Provider User->>SP: 1. Access Protected Resource SP->>User: 2. Redirect to IdP (SAML Request) User->>IdP: 3. SAML AuthnRequest IdP->>User: 4. Login Page User->>IdP: 5. Authenticate IdP->>User: 6. SAML Response (Assertion) User->>SP: 7. POST SAML Response SP->>SP: 8. Validate Assertion SP->>User: 9. Grant Access In today’s digital landscape, Identity and Access Management (IAM) solutions play a pivotal role in securing user data and managing access to critical systems. With numerous options available, choosing the right IAM solution can be overwhelming. In this blog post, we’ll dive into a detailed comparison of two popular IAM solutions: ForgeRock and Keycloak. By the end of this post, you’ll have a clear understanding of which solution aligns best with your organization’s needs. ...

Visual Overview: sequenceDiagram participant User participant SP as Service Provider participant IdP as Identity Provider User->>SP: 1. Access Protected Resource SP->>User: 2. Redirect to IdP (SAML Request) User->>IdP: 3. SAML AuthnRequest IdP->>User: 4. Login Page User->>IdP: 5. Authenticate IdP->>User: 6. SAML Response (Assertion) User->>SP: 7. POST SAML Response SP->>SP: 8. Validate Assertion SP->>User: 9. Grant Access In today’s rapidly evolving digital identity landscape, choosing the right Customer Identity and Access Management (CIAM) solution can be a strategic decision with long-term implications. Whether you’re modernizing legacy systems, adopting zero trust architecture, or supporting omni-channel access, selecting the best-fit CIAM platform—among ForgeRock, Ping Identity, Auth0, and Keycloak—requires a clear understanding of technical capabilities, flexibility, deployment models, and developer-friendliness. ...