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.
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 need security features specifically
- • Provides fine-grained, contextual authorization for enterprise software and AI.
- • Offers a complete platform with policy definition, enforcement, and centralized management.
Keycloak
Open-source identity and access management
Best for you if:
- • You need something completely free
- • You need identity & access features specifically
- • Keycloak is an open-source identity and access management solution
- • It provides SSO, social login, and user federation for applications and services
| At a Glance |  Cerbos | |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Security | Identity & Access |
Rating | 4.9/5 | 4.3/5 |
Choose Cerbos or Keycloak?
Choose Cerbos if
Fine-grained, contextual, and continuous authorization for enterprise software and AI systems.
- 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.
- Your work is security-shaped, not identity & access-shaped
Choose Keycloak if
Open-source identity and access management
- Open source identity
- Self-hostable
- Feature rich
- You want a fully free tool (Cerbos requires payment)
- Your work is identity & access-shaped, not security-shaped
| Feature | Cerbos | Keycloak |
|---|---|---|
| Pricing Model | Freemium | Free |
| User Rating | ★4.9/5 6 reviews | ★4.3/5 101 reviews |
| Categories | SecurityDeveloper Tools | Identity & AccessSecurity |
In-Depth Analysis
Cerbos
Fine-grained, contextual, and continuous authorization for enterprise software and AI systems.
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
Keycloak
Open-source identity and access management
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
Pricing: Cerbos vs Keycloak
| Plan | Cerbos | Keycloak |
|---|---|---|
| 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: 4.9/5 (6 reviews). Keycloak: 4.3/5 (101 reviews).
Go with: Cerbos
Value user reviews?
Cerbos: 6 reviews (4.9/5). Keycloak: 101 reviews (4.3/5).
Go with: Keycloak
3 Questions to Help You Decide
What's your budget?
Cerbos is freemium. Keycloak is free. Go with Keycloak if free matters most.
What's your use case?
Cerbos is a security tool. Keycloak is in identity & access. Pick the category that matches your needs.
How important are ratings?
Cerbos is rated higher: 4.9/5 vs 4.3/5.
Key Takeaways
Keycloak
- Larger review base (101 reviews)
- Completely free
- Our pick for this comparison
Cerbos
- Higher user rating: 4.9/5 vs 4.3/5
- Better fit for security
The Bottom Line
Keycloak is our pick.
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.