Open Policy Agent (OPA)
General-purpose policy engine for cloud-native environments with Rego policy language.
Open Policy Agent (OPA) is a CNCF graduated project that provides a general-purpose policy engine for cloud-native environments. Uses Rego, a declarative policy language. Integrates with Kubernetes (via Gatekeeper), service meshes (Envoy, Istio), CI/CD pipelines, and APIs. Policies-as-code with version control, testing, and audit. Industry standard for policy enforcement in cloud-native stacks.
- Best for: Policy & Governance
- Pricing: Free and open-source (Apache 2.0)
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Features
Audit Mode
Report violations without blocking
Audit mode in Gatekeeper
CI/CD Integration
Policy checks in pipelines
CI/CD integration via OPA CLI
Cost Estimation
Estimate cloud costs before deployment
Not a cost estimation tool
Custom Policies
Write organization-specific policies
Custom Rego policies
Enforce Mode
Block non-compliant resources
Enforce mode in Gatekeeper
Infrastructure Policy
Enforce policies on Terraform/CloudFormation
Terraform Cloud Sentinel integration
Kubernetes Admission Control
Validate/mutate resources at API server admission
Via OPA Gatekeeper for Kubernetes admission
Policy Reporting
Dashboard and reports on compliance
Constraint templates and audit reports
Policy as Code
Define policies in version-controlled code
Rego policy language, version-controlled
Regulatory Compliance
Pre-built policies for SOC2, HIPAA, PCI-DSS
Pre-built library for common policies
Best For
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