Terrascan vs Open Policy Agent: Which is Better in 2026?
Choosing between Terrascan 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: Terrascan 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:
Terrascan
Detect compliance and security violations across Infrastructure as Code (IaC) to mitigate risk.
Best for you if:
- • Scans Infrastructure as Code (IaC) for security and compliance violations.
- • Includes 500+ out-of-the-box policies and supports custom policies via OPA/Rego.
Open Policy Agent
Unify policy enforcement across your entire software stack with a high-performance policy engine.
Best for you if:
- • Centralized policy engine for consistent enforcement across the stack.
- • Uses Rego, a high-performance declarative language for policy definition.
| At a Glance |  Terrascan |  Open Policy Agent |
|---|---|---|
Starts at | Free | Free |
Best For | Security | Security |
Rating | - | - |
Choose Terrascan or Open Policy Agent?
Choose Terrascan if
Detect compliance and security violations across Infrastructure as Code (IaC) to mitigate risk.
- Infrastructure as Code security scanner
- Policy as code approach
- Multi-IaC support (Terraform, K8s, etc.)
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
| Feature | Terrascan | Open Policy Agent |
|---|---|---|
| Pricing Model | Free | Free |
| User Rating | No ratings yet | No ratings yet |
| Categories | SecurityDevOps | SecurityDevOps |
In-Depth Analysis
Terrascan
Detect compliance and security violations across Infrastructure as Code (IaC) to mitigate risk.
Strengths
- +Infrastructure as Code security scanner
- +Policy as code approach
- +Multi-IaC support (Terraform, K8s, etc.)
- +Open-source and free
- +CI/CD integration ready
Weaknesses
- -Configuration required
- -False positives possible
- -Policy writing needed
- -Learning curve for rules
- -May slow CI pipelines
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: Terrascan vs Open Policy Agent
| Plan | Terrascan | Open Policy Agent |
|---|---|---|
| Tier 1 | Free Open Source | N/A |
Pricing verified from each vendor's public pricing page. Compare in detail on Terrascan pricing and Open Policy Agent pricing.
Who Should Use What?
On a budget?
Both are free. Compare plans on their websites.
Go with: Terrascan
Want the highest-rated option?
Neither has user reviews yet.
Go with: Terrascan
Value user reviews?
Neither has user reviews yet.
Go with: Terrascan
3 Questions to Help You Decide
What's your budget?
Both are free. Pricing won't help you decide here.
What's your use case?
Both are security tools. Compare their specific features to decide.
How important are ratings?
Neither has user reviews yet.
Key Takeaways
Terrascan
- Completely free
- Our pick for this comparison
Open Policy Agent
- Choose if you want unify policy enforcement across your entire software stack with a high-performance policy engine
The Bottom Line
Terrascan is our pick.
Frequently Asked Questions
Is Terrascan or Open Policy Agent better?
Terrascan is rated in our evaluation. Both are free.
What are Terrascan and Open Policy Agent used for?
Terrascan: Detect compliance and security violations across Infrastructure as Code (IaC) to mitigate risk.. Open Policy Agent: Unify policy enforcement across your entire software stack with a high-performance policy engine..
What does Terrascan cost vs Open Policy Agent?
Terrascan is completely free. Open Policy Agent is completely free. Visit their websites for detailed pricing.