The Top 6 Keycloak Alternatives

Keycloak is a widely used open-source identity and access management (IAM) solution developed by Red Hat. Many teams choose it for its flexibility, open standards support, and vendor-neutral deployment. But while Keycloak gives you full control, it comes with tradeoffs.

Teams often run into challenges when moving from testing to production, from complex setup to scaling limitations to ongoing maintenance. That’s why many developers and enterprises look for Keycloak alternatives that provide the same flexibility without the operational burden.

This guide explores:

• Why Keycloak's complexity leads teams to look for alternatives

• The key criteria for evaluating a replacement

• A side-by-side breakdown of the top six options

• How to match the right alternative to your team's needs

Why developers seek Keycloak alternatives

Keycloak alternatives offer similar IAM functionality, often with more flexibility, an easier setup, or certain auth features.

Many teams look for Keycloak alternatives for a few key reasons:

• Complex setup and deployment: Getting Keycloak production-ready is difficult, especially with SSL, proxies, and hostname configuration. Documentation often leaves gaps, forcing teams to dig through forums for answers.

• Scaling and multitenancy limits: Performance degrades when running large numbers of realms or tenants. Clustering, caching, and startup tuning require extra operational overhead that slows teams down.

• Upgrade and maintenance burden: Because Keycloak is self-hosted, teams must handle patches, upgrades, and backups themselves. Major version changes can break custom themes or extensions, making upgrades risky.

• Support and documentation gaps: Most help is community-driven. Official documentation doesn’t always cover advanced or real-world scenarios, leaving DevOps teams to figure things out themselves.

• Poor admin UX and customization hurdles: The admin console is often seen as unintuitive. Customizing themes or login pages usually means working with complex templates instead of simple, modern UI tooling.

• Vendor lock-in and migration difficulty: Exporting user data, passwords, and realm configurations is cumbersome, and custom extensions don’t transfer easily.

Each alternative below addresses these gaps differently, depending on your technical requirements, scale, and roadmap.

What to look for in a Keycloak alternative

Every organization’s needs and use cases for IAM and auth functions are different. When comparing Keycloak alternatives, consider:

• Managed vs. self-hosted tradeoffs: Keycloak is fully self-hosted. Some Keycloak alternatives are also self-hosted, while some are fully managed, and others offer hybrid or modular deployment options. Consider whether your team is better served by a managed alternative with less operational overhead, a self-hosted option with more deployment flexibility, or a hybrid option.  

• Multi-tenancy and B2B readiness: While Keycloak can accommodate multi-tenancy and B2B environments, some Keycloak alternatives are designed with multi-tenancy as a first-class feature, rather than a workaround. If your application serves multiple customers or organizations, each with their own users, roles, and access policies, native multi-tenancy support is essential. 

• Developer experience: Getting Keycloak to production requires a high level of skill and significant setup time. Some Keycloak alternatives offer a lower bar to entry with APIs, SDKs, and UI tooling available via low- and no-code flows.

• Authentication flexibility: Keycloak supports a wide range of auth protocols, but adding methods like passkeys or adaptive MFA often requires custom extensions or third-party plugins. Alternatives that support passwordless authentication natively, without custom code, give your team the flexibility to evolve auth flows as needed without friction.

• Operational overhead vs. speed to market: More control over your identity stack often means more operational overhead and time spent on ongoing maintenance, which slows speed to market. The right tradeoff depends on your team’s priorities. 

Keycloak alternatives at a glance

Here’s how the top Keycloak alternatives stack up:

Descope

Overview

Descope is a modern external IAM platform built for developers who want flexible, secure authentication without the complexity of managing Keycloak infrastructure. While Keycloak requires self-hosting, manual configuration, and ongoing maintenance, Descope provides a fully managed solution that lets teams design and deploy authentication flows visually, without servers or scripts. 

It is especially powerful for B2C and B2B SaaS applications, as well as use cases like agent identity and MCP-based ecosystems, where multi-tenancy, fine-grained access control, and delegated trust are critical.

Unlike Keycloak, which demands significant DevOps effort to scale, customize, and integrate with third-party tools, Descope simplifies the process. It unifies authentication, MFA, SSO, and authorization in one platform, supporting both human users and AI agents natively so teams can build secure, user and agent-ready applications without piecing together multiple identity components.

Key capabilities

• Drag & drop visual editor to build and update login, signup, and MFA flows without code

• Extensive plug & play connector ecosystem for seamless integration with third-party services

• Anonymous user tracking for top-of-funnel B2C user visibility

• Comprehensive SSO Setup Suite for configuring, mapping, and testing SSO and SCIM connections

• Embeddable UI widgets for self-service identity management and admin

• Support for a wide range of auth methods including passkeys, OTP, magic links,social login, and Google One Tap

• Built-in multi-tenant management with RBAC and FGA

• Adaptive MFA, session protection, and bot detection 

• Broad SDK coverage with 15+ SDKs for web, mobile, and backend environments, plus a full-featured REST API

• Identity orchestration that coordinates authentication, authorization, risk, and fraud tools

• Built-in support for agentic identity to enable scoped, secure access for autonomous AI agents and apps.

Augment existing Keycloak deployments

If teams aren’t ready to fully migrate off Keycloak, Descope can seamlessly augment Keycloak by acting as a federated identity provider to add advanced capabilities such as passwordless authentication, adaptive MFA, and modern SSO experiences without replacing the existing identity stack.

Strengths

• Visual workflow editor: Descope includes a drag-and-drop interface that lets developers design, test, and update login, signup, MFA, and SSO flows in minutes. This eliminates the need for backend scripting or XML configuration that Keycloak often requires. 

• Predictable pricing and responsive support: Descope’s pricing is simple and predictable, based on usage rather than tiers or add-ons. Unlike Keycloak, which depends on community forums for help, Descope offers direct, responsive support and extensive documentation as well as having earned the G2 Best Support badge for multiple consecutive quarters.

• Streamlined SSO: With Descope, developers can configure enterprise SSO, SCIM provisioning, and tenant access through visual workflows or self-service portals. Keycloak often needs custom scripting or extensions to achieve similar results, while Descope handles it natively without downtime or user disruption.

• Passwordless authentication: Descope supports passkeys, magic links, OTP, and social login natively. These methods can be easily added to any flow, reducing reliance on passwords while improving UX and security.

• Omnichannel authentication: With Descope, authentication flows can be unified across web, mobile, and third-party or partner applications. The same no-code or low-code workflows can be reused across environments, making updates and scaling easier over time.

• Adaptive MFA: Descope includes adaptive MFA by default, letting teams apply step-up authentication only when risk signals warrant it. Integration with both built-in and third-party risk tools happens directly within the flow, unlike Keycloak where advanced MFA logic often requires separate extensions or scripting.

• Enterprise agent ready: Descope supports secure authentication and access control for agentic AI systems using Inbound Apps, Outbound Apps, and MCP Auth SDKs. 

• Developer-first flexibility: Whether using hosted components or fully custom UIs, Descope gives developers flexibility with SDKs and APIs in React, Node.js, Python, Flutter, and more. The platform fits into any tech stack without locking teams into rigid patterns.

Ideal for

SaaS developers and enterprises who want customizable, modern authentication without running and maintaining their own IAM stack.

Amazon Cognito

Overview

Amazon Cognito is AWS’s fully managed authentication and user management service. Unlike Keycloak, which requires self-hosting, configuration, and maintenance, Cognito handles infrastructure, scaling, and high availability automatically. It provides user pools for authentication, identity pools for temporary AWS credentials, and tight integration with the broader AWS ecosystem. This makes Cognito an appealing choice for developers who want to move away from Keycloak’s operational overhead and leverage AWS-native services for identity.

Key capabilities

• Managed user pools for authentication and profile management

• Federation with social logins and enterprise identity providers via SAML and OIDC

• Built-in MFA and adaptive authentication features

• Native integration with AWS services like API Gateway, Lambda, and IAM

• SDKs for iOS, Android, JavaScript, and major backend languages

Strengths

• Fully managed platform: Cognito removes the need to host or update your own identity stack, unlike Keycloak’s manual deployments and upgrades.

• Seamless AWS integration: Easily connect authentication to APIs, databases, and serverless functions using native AWS tools.

• Effortless scalability: Cognito automatically scales to millions of users without requiring realm tuning or clustering setups.

• Security and compliance: Cognito inherits AWS’s security framework and compliance certifications, reducing the risk of misconfiguration or patching errors that can occur in self-managed Keycloak environments.

Ideal for

Teams already building on AWS who want to simplify identity management, reduce operational overhead, and ensure their authentication stack scales securely with their infrastructure.

Microsoft Entra External ID

Overview

Microsoft Entra External ID is a cloud-based identity and access management service designed for organizations that need to securely manage and authenticate external users. Unlike Keycloak, which requires manual configuration, upgrades, and self-hosted infrastructure, Entra External ID delivers identity as a managed service with deep integrations across the Microsoft ecosystem. It combines secure authentication, user lifecycle management, and governance in a single platform.

Key capabilities

• Supports sign-up and sign-in for external users with social or enterprise identities

• Customizable branded user journeys for portals and apps

• Built-in MFA, conditional access, and risk-based authentication

• Lifecycle management tools for access reviews, provisioning, and expiration policies

• Seamless integration with Azure AD, Microsoft 365, and other Microsoft cloud services

Strengths

• Fully managed enterprise identity: Eliminates the need for self-hosting and manual scaling common with Keycloak deployments.

• Compliance and governance ready: Offers built-in support for identity governance, auditing, and access certifications to meet enterprise and regulatory requirements.

• Microsoft ecosystem integration: Works natively with Azure and Microsoft 365, simplifying identity management across productivity and infrastructure tools.

• Customizable user experiences: Provides visual configuration of user journeys and branding options that would otherwise require custom Keycloak templates or extensions.

Ideal for

Organizations operating within the Microsoft ecosystem or seeking a managed alternative to Keycloak that provides advanced governance, compliance, and lifecycle management out of the box.

FusionAuth

Overview

FusionAuth is a developer-focused identity and access management platform that can be self-hosted or deployed as a managed cloud service. Like Keycloak, it supports open standards such as OAuth2, OIDC, and SAML, but it’s designed to be easier to install, customize, and operate. FusionAuth offers a strong alternative for teams that want control over their identity environment without the operational complexity of maintaining Keycloak.

Key capabilities

• Flexible deployment options, including on-premises, private cloud, or FusionAuth Cloud

• Support for OAuth2, OpenID Connect, SAML, and SCIM

• Multi-tenant and multi-application management from a single dashboard

• Built-in MFA, passwordless login, and passkey support

• Modern RESTful APIs and SDKs for multiple programming languages

Strengths

• Ease of setup and maintenance: Installs quickly with fewer dependencies than Keycloak and requires less tuning to reach production readiness.

• Developer-friendly design: Clear documentation, strong APIs, and an intuitive admin UI simplify customization compared to Keycloak’s XML-based configuration and templating.

• Flexible hosting model: Teams can self-host for full control or use the managed FusionAuth Cloud to offload maintenance.

• Comprehensive feature set: Delivers enterprise protocols, fine-grained roles, and advanced MFA out of the box without relying on community extensions.

Ideal for

Development teams that value open standards and deployment flexibility but want a smoother, more maintainable experience than running Keycloak.

Authentik

Overview

Authentik is an open-source identity provider designed to offer a simpler, more modern alternative to Keycloak. It focuses on ease of deployment, clean configuration, and native integration with modern infrastructure tools. While Keycloak can feel heavy and complex to maintain, Authentik provides a lighter, modular architecture that’s easier to run in containerized or cloud-native environments. It delivers the flexibility of open source without the steep learning curve often associated with Keycloak’s realm and configuration model.

Key capabilities

• Support for standard protocols such as OAuth2, OIDC, and SAML

• Native directory synchronization with LDAP and SCIM

• Application proxy for protecting web applications and internal dashboards

• Built-in MFA and policy-based access control

• Admin interface and APIs for managing users, groups, and applications

Strengths

• Lightweight and easy to deploy: Installs quickly and requires less setup overhead compared to Keycloak’s multi-realm architecture.

• Modern admin experience: Offers a clean, straightforward UI that simplifies configuration and reduces errors.

• Flexible integrations: Works well with Docker, Kubernetes, and reverse proxies, making it a good fit for modern DevOps environments.

• Active community and development: Regular updates and community engagement ensure faster iteration and usability improvements than many older IAM projects.

Ideal for

Teams seeking an open-source identity provider that retains Keycloak’s flexibility but is easier to deploy, manage, and customize for modern infrastructure.

Ory Kratos

Overview

Ory Kratos is an open-source identity and user management system built for modern, cloud-native applications. Like Keycloak, it gives developers full control over authentication and user lifecycle management, but with a more API-driven and headless architecture. Instead of relying on a heavy admin console or complex realm structure, Ory Kratos exposes identity and session management through REST APIs. It’s part of the broader Ory ecosystem, which includes Ory Hydra (OAuth2/OIDC), Ory Keto (authorization), and Ory Oathkeeper (access control).

Key capabilities

• Headless API-first architecture for authentication and user management

• Support for password, magic link, social, and passwordless login flows

• Self-service registration, recovery, and profile management endpoints

• Integration with Ory Hydra for OAuth2 and OIDC token issuance

• Works natively with Kubernetes, Docker, and other modern DevOps tools

Strengths

• API-first and composable: Designed for developers who prefer to build their own UIs and integrate identity directly into microservices.

• Lightweight and modern: Built for containerized deployments with a smaller footprint and faster startup than Keycloak.

• Modular design: Can be paired with other Ory components to extend capabilities, offering flexibility that aligns with cloud-native architectures.

• Open-source and transparent: Maintained under a permissive license with strong community and enterprise support via Ory Cloud.

Ideal for

Engineering teams that want a flexible, open-source identity solution built for modern infrastructure and prefer an API-driven approach over Keycloak’s UI-based configuration and heavier deployment model.

How to choose the right Keycloak alternative

Choosing a Keycloak replacement requires understanding your specific needs, including internal factors. Consider these aspects of your organization to determine the right fit:

• Team size: Startups have different needs and means than more established, enterprise organizations. The ease of Authentik might be preferable for startups, while enterprise organizations may prefer features like branded user journeys with Entra External ID.

• Architecture: Teams working within the AWS or Microsoft ecosystem may gravitate toward Cognito or Entra External ID, respectively. Those operating across microservices might prefer a solution like FusionAuth. A solution like Descope fits across architectures because it integrates at the application layer, rather than requiring changes to your underlying infrastructure. 

• Hosting preferences: Rather than Keycloak’s self-hosting, you might prefer a fully managed option, a self-hosted option with a lighter operational footprint, or something in between. The right choice depends on what your team is optimizing for: infrastructure control, privacy, operational costs, or flexibility. 

• Use case: B2B and B2C use cases call for different features. Agentic and AI workflows add another dimension, with different requirements. Descope addresses these varying requirements without the need for separate platforms or custom extensions, offering B2B CIAM capabilities, B2C tooling, and agentic identity support that handles auth for AI agents and MCP servers.

Conclusion 

Keycloak remains a powerful open-source identity platform, but its complexity, overhead, and scaling limitations can become challenges as projects mature. Teams that start with Keycloak for its flexibility and control frequently find themselves burdened by operational upkeep, difficult upgrades, and limited enterprise features. As a result, many developers look for alternatives that deliver the same standards-based foundation without the heavy infrastructure demands.

Among the available options, Descope stands out for its developer-friendly visual workflows, built-in multi-tenancy, and seamless support for modern auth methods such as passkeys, SSO, and adaptive MFA. By removing the friction of self-hosting and manual configuration, Descope helps teams launch faster, scale securely, and spend more time building their own products.

Sign up for a Free Forever account with Descope and start building secure, scalable auth flows today. Have questions about augmenting or replacing Keycloak? Book time with our experts.

FAQs about Keycloak alternatives