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Cerbos vs Keycloak: Which is Better in 2026?

Choosing between Cerbos and Keycloak comes down to understanding what each tool does best. This comparison breaks down the key differences so you can make an informed decision based on your specific needs, not marketing claims.

Bottom line: Keycloak wins this matchup. Our overall Identity & Access pick is 1Password. Our free Identity & Access pick is Swiftlane. Pick Cerbos if you need security.

··Methodology
Editor reviewed0 verified reviews comparedPricing checked Sep 2026

Short on time? Here's the quick answer

We've tested both tools. Here's who should pick what:

Cerbos

Fine-grained, contextual, and continuous authorization for enterprise software and AI systems.

Best for you if:

  • • You want significantly accelerates time to market for new roles and permissions
  • • You want reduces AI security risks by preventing over-permissioning and shadow access

Keycloak

Open-source identity and access management

Best for you if:

  • • You want a fully free tool (Cerbos requires payment)
  • • You want open source identity
  • • You want self-hostable
At a Glance
CerbosCerbos
KeycloakKeycloak
Starts at
FreeFree tier available
FreeFree tier available
Best For
SecurityIdentity & Access
Rating
4.9/5-
Free plan
 Yes Yes

Choose Cerbos or Keycloak?

Cerbos

Choose Cerbos if

Fine-grained, contextual, and continuous authorization for enterprise software and AI systems.

  • You want significantly accelerates time to market for new roles and permissions
  • You want reduces AI security risks by preventing over-permissioning and shadow access
  • Your work is security-shaped, not identity & access-shaped
Keycloak

Choose Keycloak if

Open-source identity and access management

  • You want a fully free tool (Cerbos requires payment)
  • You want open source identity
  • You want self-hostable
  • Your work is identity & access-shaped, not security-shaped
Cerbos logo

Cerbos

Fine-grained, contextual, and continuous authorization for enterprise software and AI systems.

Visit Website
TOP RATED
Keycloak logo

Keycloak

Open-source identity and access management

Visit Website
FeatureCerbosKeycloak
Pricing ModelFreemiumFree
User Rating
★4.9/5
6 reviews
No ratings yet
Categories
SecurityDeveloper Tools
Identity & AccessSecurity

In-Depth Analysis

CerbosCerbos

Fine-grained, contextual, and continuous authorization for enterprise software and AI systems.

Starts at Free
Good value

Cerbos offers a generous free tier and a Proof of Concept plan, making it highly accessible for evaluation and small-scale use.

Watch out

Overage fees for monthly active principals

Strengths

  • +Significantly accelerates time to market for new roles and permissions.
  • +Reduces AI security risks by preventing over-permissioning and shadow access.
  • +Offers substantial cost reduction by eliminating custom authorization infrastructure.
  • +Provides comprehensive audit logs for compliance and visibility into security posture.
  • +Supports a wide range of programming languages and deployment environments.

Weaknesses

  • -Pricing for higher tiers can be significant for large enterprises.
  • -Requires integration into existing applications and infrastructure, which may involve initial setup effort.

Key features

Fine-grained, contextual, and continuous authorizationPolicy Decision Point (PDP) for access evaluationPolicy Enforcement Point (PEP) SDKs for in-app enforcementCerbos Hub for centralized policy management, testing, and deploymentProgrammatic policy management via CLI and APIAutomated policy validation and testing

KeycloakKeycloak

Open-source identity and access management

Starts at Free
Great value

Keycloak's pricing is exceptionally generous, being entirely free as an open-source solution.

Strengths

  • +Open source identity
  • +Self-hostable
  • +Feature rich
  • +No per-user cost
  • +Enterprise ready

Weaknesses

  • -Complex to set up
  • -Requires maintenance
  • -Learning curve
  • -Java-based
  • -UI dated

Key features

Identity managementSSOLDAPSocial loginAdmin consoleOpen source

Pricing: Cerbos vs Keycloak

PlanCerbosKeycloak
Tier 1
Free forever
Open source
Free
Open Source
Tier 2
$0/month
Proof of Concept
N/A
Tier 3
From $25/month
Development
N/A
Tier 4
From $933/month
Production
N/A
Tier 5
Contact us
Enterprise
N/A

Pricing verified from each vendor's public pricing page. Compare in detail on Cerbos pricing and Keycloak pricing.

Who Should Use What?

On a budget?

Keycloak is free. Cerbos is freemium.

Go with: Keycloak

Want the highest-rated option?

Cerbos is rated 4.9/5. Keycloak has no ratings yet.

Go with: Cerbos

Value user reviews?

Cerbos: 6 reviews (4.9/5). Keycloak: no ratings yet.

Go with: Cerbos

3 Questions to Help You Decide

1

What's your budget?

Cerbos is freemium. Keycloak is free. Go with Keycloak if free matters most.

2

What's your use case?

Cerbos is a security tool. Keycloak is in identity & access. Pick the category that matches your needs.

3

How important are ratings?

Cerbos is rated 4.9/5; Keycloak has no ratings yet.

Key Takeaways

Keycloak

  • Completely free
  • Our pick for this comparison

Cerbos

  • Better fit for security

The Bottom Line

Keycloak wins this matchup. Our overall Identity & Access pick is 1Password. Our free Identity & Access pick is Swiftlane.

Frequently Asked Questions

Is Cerbos or Keycloak better?

Keycloak is rated in our evaluation. Cerbos is freemium and Keycloak is free.

What are Cerbos and Keycloak used for?

Cerbos: Fine-grained, contextual, and continuous authorization for enterprise software and AI systems.. Keycloak: Open-source identity and access management.

What does Cerbos cost vs Keycloak?

Cerbos is freemium (free tier + paid plans). Keycloak is completely free. Visit their websites for detailed pricing.

Related Comparisons & Resources

Cerbos AlternativesKeycloak AlternativesCerbos Full ReviewKeycloak Full Review
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