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FusionAuth vs keycloak

Side-by-side comparison of features, pricing, ratings, and alternatives.

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FusionAuth
FusionAuthDeveloper-friendly identity and access management platform
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keycloak
keycloakOpen-source identity and access management for modern applications
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Overview
Description

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.

Pricing
Freemium
Free
Category
Identity & SSO
Identity & SSO
Best for
Developers and product teams
Enterprises and developers
Specifications
open source
Yes
Yes
api available
Yes
Yes
support options
Email, Community Forum, Paid Support Plans
Community forum, GitHub issues, Red Hat support
key integrations
Google, Facebook, GitHub, Azure AD, Okta, Slack
LDAP, Active Directory, Kubernetes, Docker, Spring Boot
deployment
—
Self-hosted
github stars
—
36,057
primary language
—
Java
Pros & Cons
Pros
  • 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
Cons
  • 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
Community & Metrics
Upvotes
0
0
User rating
Not enough data
Not enough data

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The Verdict

AI-generated from listing data

FusionAuth 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.
DimensionWinner

Pricing & value

FusionAuth has a freemium model with paid enterprise features; Keycloak is free but may need paid Red Hat support for enterprise.

FusionAuth

Ease of use / learning curve

FusionAuth is described as developer‑friendly with clear docs; Keycloak’s initial setup is noted as complex for beginners.

FusionAuth

Features & depth

Keycloak includes LDAP/AD federation and multi‑tenant realms, which FusionAuth does not mention.

keycloak

Integrations & ecosystem

Both support major social providers; Keycloak adds LDAP/AD, Kubernetes, Docker; FusionAuth adds Azure AD, Okta, Slack.

Tie

Support

FusionAuth offers paid support plans; Keycloak relies on community and optional Red Hat support.

FusionAuth

Scalability

Keycloak’s design includes multi‑tenant realms and enterprise‑grade scaling; FusionAuth’s scaling details not specified.

keycloak

Security & privacy

Both provide MFA, OAuth2/OIDC/SAML; no specific privacy differences are detailed.

Tie

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.