FusionAuth vs keycloak
Side-by-side comparison of features, pricing, ratings, and alternatives.
FusionAuth provides a complete customer identity and access management solution that developers can integrate quickly via APIs, SDKs, and webhooks. It handles authentication, authorization, and user lifecycle management while offering both cloud SaaS and self‑hosted deployments. The platform includes built‑in support for social logins, multi‑factor authentication, passwordless flows, and fine‑grained role‑based access control, making it suitable for everything from startups to large enterprises.
Keycloak provides single sign‑on (SSO) and identity brokering for web, mobile, and API‑based applications. It supports standard protocols like OpenID Connect, OAuth 2.0, and SAML, allowing seamless integration with existing user stores. The platform includes an admin console, user self‑service, and fine‑grained authorization policies, all available under an Apache 2.0 license. It can be deployed on‑premises or used as a managed service, making it suitable for both startups and large enterprises.
- Easy integration with extensive SDKs
- Rich feature set in free tier
- Self‑hosted option for full data control
- Clear documentation and active community
- Fully open source with no licensing fees
- Supports all major authentication standards
- Extensible with custom providers and scripts
- Strong community and Red Hat enterprise support
- Advanced enterprise features require paid plan
- UI can feel dated compared to newer competitors
- Limited out‑of‑the‑box UI customization
- Initial setup can be complex for beginners
- Admin UI may feel dated compared to newer SaaS solutions
- Self‑hosted scaling requires operational expertise
More alternatives & similar tools
Alternatives to FusionAuth
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Alternatives to keycloak
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The Verdict
AI-generated from listing dataFusionAuth offers a freemium SaaS or self‑hosted option with richer out‑of‑the‑box UI and built‑in MFA, while Keycloak is fully free, open‑source and more enterprise‑oriented but requires more setup effort.
Key differences
- •FusionAuth provides a free tier with many features and optional paid plans; Keycloak is completely free but no paid tier.
- •FusionAuth includes built‑in multi‑factor (SMS, TOTP, WebAuthn) and passwordless options; Keycloak’s MFA is available but not highlighted in the facts.
- •FusionAuth offers both SaaS and self‑hosted Docker deployment; Keycloak is only self‑hosted.
- •Keycloak has built‑in user federation with LDAP/Active Directory and multi‑tenant realms; FusionAuth’s federation is limited to social providers.
- •Support: FusionAuth lists paid support plans; Keycloak relies on community and optional Red Hat support.
Pricing & value
FusionAuth has a freemium model with paid enterprise features; Keycloak is free but may need paid Red Hat support for enterprise.
Ease of use / learning curve
FusionAuth is described as developer‑friendly with clear docs; Keycloak’s initial setup is noted as complex for beginners.
Features & depth
Keycloak includes LDAP/AD federation and multi‑tenant realms, which FusionAuth does not mention.
Integrations & ecosystem
Both support major social providers; Keycloak adds LDAP/AD, Kubernetes, Docker; FusionAuth adds Azure AD, Okta, Slack.
Support
FusionAuth offers paid support plans; Keycloak relies on community and optional Red Hat support.
Scalability
Keycloak’s design includes multi‑tenant realms and enterprise‑grade scaling; FusionAuth’s scaling details not specified.
Security & privacy
Both provide MFA, OAuth2/OIDC/SAML; no specific privacy differences are detailed.
Choose FusionAuth if…
Teams needing quick start, SaaS option, built‑in MFA, and willing to pay for advanced features.
Choose keycloak if…
Enterprises requiring LDAP/AD federation, multi‑tenant realms, and full control over self‑hosted deployment.
Common questions
Is there any cost to start using either product?
FusionAuth offers a freemium tier; Keycloak is completely free.
Which product is easier for a small dev team to integrate and launch?
FusionAuth is marketed as developer‑friendly with extensive SDKs and clear docs, making initial integration simpler.
Can I use LDAP or Active Directory for user federation?
Keycloak supports LDAP and Active Directory federation; FusionAuth does not list this capability.