Policy as code toolkit review: Kubernetes, Terraform, cloud guardrails, and app authorization engines.

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A comprehensive review of 12 policy as code tools across six categories: general policy engines (OPA), Kubernetes admission control (Gatekeeper, Kyverno, ValidatingAdmissionPolicy), Terraform/IaC enforcement (Sentinel, Spacelift), IaC scanning (Checkov, Terrascan), cloud provider guardrails (Azure Policy, AWS SCPs, Google Cloud Organization Policy), and application authorization (AWS Cedar). Each tool is evaluated with key features and ideal use cases for enforcing governance, security, and compliance through automated, version-controlled policies.

Top 12 Policy as Code (PaC) Tools in 2025