FusionAuth vs Keycloak
On the evidence we track, Keycloak leads this comparison with a composite score of 65/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.
Capabilities
Feature-by-feature on the axes that matter for auth & identity software. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
FusionAuth
Provides authentication and authorization infrastructure that developers can deploy and integrate with their applications, supporting standard protocols like OAuth 2.0 and OpenID Connect.
Keycloak
LeaderAn open-source identity management solution that allows users to authenticate once and gain access to multiple applications, eliminating the need for individual login handling at the application level.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
FusionAuth
From $162/month billed annually. Free tier available for self-hosting.
- CommunityFree
- Core authentication standards and features
- Community support via forums, Slack, and GitHub
- Self-hosted deployment
- Starter$162/month billed annually
- Premium authentication features
- Breached Password Detection
- Machine-to-Machine authentication
- Advanced MFA
- Application theming
- +1 more
- Essentials-
- Advanced connectivity, MFA, and security features
- Custom OAuth scopes
- Email support (24-48 hour response time)
- Business hosting
- EnterpriseContact sales
- Advanced threat detection
- SSO Tenant Manager
- 24/7 phone and email support
- Private Slack channel
- Solution architect guidance
- +2 more
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
- LDAP
FusionAuth
- Legacy database systems
- Kafka
- Custom APIs
- Webhooks
Keycloak
Leader- GitHub
- Active Directory
- Kerberos
- Kubernetes
- Apache APISIX
- OpenTelemetry
- OpenID Connect
- SAML 2.0
FusionAuth or Keycloak: which one depends on you
A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.
Free to run, no account needed to start. How the evaluation works
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.