Cerbos vs Open Policy Agent: Which is Better in 2026?
Choosing between Cerbos and Open Policy Agent 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: Cerbos is our overall pick for security workflows. Pick Open Policy Agent if you need a fully free option.
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:
- • Provides fine-grained, contextual authorization for enterprise software and AI.
- • Offers a complete platform with policy definition, enforcement, and centralized management.
Open Policy Agent
Unify policy enforcement across your entire software stack with a high-performance policy engine.
Best for you if:
- • You need something completely free
- • Centralized policy engine for consistent enforcement across the stack.
- • Uses Rego, a high-performance declarative language for policy definition.
| At a Glance |  Cerbos |  Open Policy Agent |
|---|---|---|
Starts at | FreeFree tier available | FreeFree tier available |
Best For | Security | Security |
Rating | 4.9/5 | - |
Choose Cerbos or Open Policy Agent?
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.
Choose Open Policy Agent if
Unify policy enforcement across your entire software stack with a high-performance policy engine.
- Unifies policy enforcement across diverse systems
- Enhances developer productivity by externalizing policy
- Provides detailed audit trails for compliance and debugging
- You want a fully free tool (Cerbos requires payment)
| Feature | Cerbos | Open Policy Agent |
|---|---|---|
| Pricing Model | Freemium | Free |
| User Rating | ★4.9/5 6 reviews | No ratings yet |
| Categories | SecurityDeveloper Tools | SecurityDevOps |
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
Open Policy Agent
Unify policy enforcement across your entire software stack with a high-performance policy engine.
Strengths
- +Unifies policy enforcement across diverse systems
- +Enhances developer productivity by externalizing policy
- +Provides detailed audit trails for compliance and debugging
- +High performance due to Rego language and in-memory data processing
- +Flexible and extensible for a wide range of use cases
Weaknesses
- -Requires learning a new declarative language (Rego)
- -Initial setup and integration can be complex for new users
- -Policy management can become intricate for very large and complex organizations
Key features
Pricing: Cerbos vs Open Policy Agent
| Plan | Cerbos | Open Policy Agent |
|---|---|---|
| Tier 1 | Free forever Open source | N/A |
| 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 Open Policy Agent pricing.
Who Should Use What?
On a budget?
Open Policy Agent is free. Cerbos is freemium.
Go with: Open Policy Agent
Want the highest-rated option?
Cerbos is rated 4.9/5. Open Policy Agent has no ratings yet.
Go with: Cerbos
Value user reviews?
Cerbos: 6 reviews (4.9/5). Open Policy Agent: no ratings yet.
Go with: Cerbos
3 Questions to Help You Decide
What's your budget?
Cerbos is freemium. Open Policy Agent is free. Go with Open Policy Agent if free matters most.
What's your use case?
Both are security tools. Compare their specific features to decide.
How important are ratings?
Cerbos is rated 4.9/5; Open Policy Agent has no ratings yet.
Key Takeaways
Cerbos
- Free tier available
- Our pick for this comparison
Open Policy Agent
- Completely free
The Bottom Line
Cerbos is our pick. That said, Open Policy Agent is free, hard to beat on price.
Frequently Asked Questions
Is Cerbos or Open Policy Agent better?
Cerbos is rated in our evaluation. Cerbos is freemium and Open Policy Agent is free.
What are Cerbos and Open Policy Agent used for?
Cerbos: Fine-grained, contextual, and continuous authorization for enterprise software and AI systems.. Open Policy Agent: Unify policy enforcement across your entire software stack with a high-performance policy engine..
What does Cerbos cost vs Open Policy Agent?
Cerbos is freemium (free tier + paid plans). Open Policy Agent is completely free. Visit their websites for detailed pricing.