--- title: "FusionAuth vs Keycloak — Identity Tool Comparison | IDSync" description: "Side-by-side comparison of FusionAuth vs Keycloak: best for, pricing, deployment, integrations, and more." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://idsync.com/" }, { "@type": "ListItem", "position": 2, "name": "Directory", "item": "https://idsync.com/directory" }, { "@type": "ListItem", "position": 3, "name": "Compare", "item": "https://idsync.com/directory" }, { "@type": "ListItem", "position": 4, "name": "FusionAuth vs Keycloak", "item": "https://idsync.com/compare/fusionauth-vs-keycloak" } ] }, { "@context": "https://schema.org", "@type": "Article", "headline": "FusionAuth vs Keycloak — Identity Tool Comparison", "description": "Side-by-side comparison of FusionAuth vs Keycloak: best for, pricing, deployment, integrations, and more.", "url": "https://idsync.com/compare/fusionauth-vs-keycloak", "dateModified": "2026-05-31T13:32:15.631476+00:00", "author": { "@type": "Organization", "@id": "https://idsync.com/#organization", "name": "IDSync" }, "publisher": { "@type": "Organization", "@id": "https://idsync.com/#organization", "name": "IDSync" }, "about": [ { "@type": "SoftwareApplication", "name": "FusionAuth", "url": "https://idsync.com/directory/fusionauth" }, { "@type": "SoftwareApplication", "name": "Keycloak", "url": "https://idsync.com/directory/keycloak" } ] } ] --- [![IDSync — identity software buyer platform](/assets/idsync-logo-BKS89EW4.png)](/) [Directory](/directory) [Compare](/compare) [Resources](/resources) [Browse tools](/directory)[Run Stack Finder](/stack-finder) 1. [Home](/) 2. [Directory](/directory) 3. Compare 4. FusionAuth vs Keycloak # FusionAuth vs Keycloak Side-by-side comparison of identity tools. Sponsored placement is disclosed where applicable. Last updated 3 months ago Quick answer ## FusionAuth vs Keycloak: which should you choose? Short answer FusionAuth vs Keycloak have overlapping use cases in identity and access management. The right pick depends on your company size, deployment model, integrations, and pricing tolerance — compare those attributes side-by-side below. Best for FusionAuth: Organizations that want deployment flexibility (self-hosted option), comprehensive authentication features without MAU-based pricing at scale, and a developer-friendly API. Particularly relevant for companies in regulated industries with data residency requirements, gaming companies with large user bases, or teams that prefer open source-adjacent infrastructure. · Keycloak: Organizations that require a fully open source, self-hosted IAM platform with enterprise-grade features and no licensing cost. Strong fit for large enterprises with technical resources to operate it, government agencies with data sovereignty requirements, and universities or research institutions managing complex identity federation. When to choose Pick the option whose company-size fit, deployment model, and integrations most closely match your stack. When not to choose Skip a head-to-head if you haven't shortlisted a category yet — start with the IAM Stack Finder instead. Related tools & categories [FusionAuth](/directory/fusionauth)[Keycloak](/directory/keycloak)[IAM Stack Finder](/stack-finder)[Buyer resources](/resources) Attribute [FusionAuth](/directory/fusionauth)[](https://fusionauth.io) [Keycloak](/directory/keycloak)[](https://www.keycloak.org) Best for Organizations that want deployment flexibility (self-hosted option), comprehensive authentication features without MAU-based pricing at scale, and a developer-friendly API. Particularly relevant for companies in regulated industries with data residency requirements, gaming companies with large user bases, or teams that prefer open source-adjacent infrastructure. Organizations that require a fully open source, self-hosted IAM platform with enterprise-grade features and no licensing cost. Strong fit for large enterprises with technical resources to operate it, government agencies with data sovereignty requirements, and universities or research institutions managing complex identity federation. Short description FusionAuth is a comprehensive authentication and user management platform offering flexible deployment (self-hosted, private cloud, or FusionAuth Cloud), developer-friendly APIs, and broad feature coverage including SSO, MFA, SAML, OIDC, and multi-tenancy. Keycloak is the most widely deployed open source IAM platform, providing enterprise-grade SSO, MFA, SAML, OIDC, LDAP, and Kerberos support in a self-hosted, Apache 2.0 licensed package maintained by Red Hat. Company size Startup, Mid-market, Enterprise Mid-market, Enterprise, Government / Education Deployment Self-hosted, Private Cloud, SaaS / Cloud-hosted (FusionAuth Cloud) Self-hosted Source Source-available (Community Edition); verify current license at fusionauth.io Open source (Apache 2.0) Pricing model Free for self-hosted Community Edition; cloud and enterprise tiers by deployment/support Free (open source); Red Hat SSO commercial support available separately Integrations Google, Apple, GitHub, Facebook, LDAP, Active Directory, Salesforce, Twilio Active Directory, LDAP, Google, GitHub, Facebook, Kubernetes, Istio, Envoy Categories SSO, Customer Identity / CIAM, Developer Authentication, MFA / Passwordless SSO, Customer Identity / CIAM, Developer Authentication, MFA / Passwordless Claimed profile Buyer help ### Request a vendor shortlist Tell us what you're evaluating and IDSync will identify the identity, access, and security tools that fit your use case. 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