Best of · Cybersecurity
Top 8 Policy as Code (PaC) Tools for 2026
Policy as Code (PaC) is a critical practice for modern DevOps and security, allowing you to define, manage, and automate policies as code. These tools integrate into CI/CD pipelines to enforce security, compliance, and operational best practices before deployment. Our 2026 ranking is based on ecosystem maturity, integration capabilities, ease of use, and community support.
- 1
Open Policy Agent (OPA)
A CNCF graduated project, OPA is an open-source, general-purpose policy engine that provides a unified toolset for enforcing policies across the stack. It uses a high-level declarative language called Rego to define policies.
Why it stands out: Choose OPA for its unparalleled flexibility, broad ecosystem support, and status as the de facto industry standard for decoupled policy enforcement.
- 2
Kyverno
Also a CNCF graduated project, Kyverno is a policy engine designed specifically for Kubernetes. It allows you to manage and validate policies as Kubernetes resources, using familiar YAML manifests without requiring a new language.
Why it stands out: Pick Kyverno if you want a Kubernetes-native solution that is easier for platform and DevOps teams to adopt without learning a complex new language.
- 3
HashiCorp Sentinel
Sentinel is an embeddable policy as code framework integrated across the HashiCorp Enterprise suite, including Terraform, Vault, Consul, and Nomad. It enforces policies on infrastructure changes, secrets access, and service configurations.
Why it stands out: Ideal for organizations heavily invested in the HashiCorp ecosystem, providing seamless and deeply integrated policy enforcement points.
- 4
Checkov
An open-source static analysis tool for scanning infrastructure as code (IaC) files for misconfigurations. It supports a wide range of IaC formats, including Terraform, CloudFormation, Kubernetes, and ARM templates.
Why it stands out: Use Checkov for its comprehensive library of built-in policies and its focus on developer-first security scanning within the IDE and CI pipeline.
- 5
Trivy (incorporating tfsec)
From Aqua Security, Trivy is a comprehensive open-source security scanner that has absorbed the popular tfsec tool. It finds vulnerabilities, misconfigurations, secrets, and SBOMs in various targets, including IaC files and container images.
Why it stands out: Select Trivy for an all-in-one security scanner that consolidates IaC policy checks with container and vulnerability scanning in a single tool.
- 6
Datree
A CLI tool focused on preventing Kubernetes misconfigurations by running policy checks against manifest files and Helm charts. It provides a centralized dashboard for managing policies and viewing compliance history.
Why it stands out: A great choice for teams looking for a user-friendly, Kubernetes-focused solution with actionable feedback to prevent errors before they reach production.
- 7
Kubewarden
A policy engine for Kubernetes that leverages WebAssembly (WASM). This allows policies to be written in any programming language that compiles to WASM, such as Go, Rust, and Swift, instead of a domain-specific language.
Why it stands out: Choose Kubewarden if your team prefers to write complex policies in familiar programming languages rather than learning Rego or using YAML.
- 8
Terrascan
An open-source static code analyzer from Tenable that helps detect compliance and security violations in Infrastructure as Code. It offers over 500 out-of-the-box policies for various cloud providers and security standards.
Why it stands out: A strong alternative to Checkov, particularly for teams that value a large, pre-built policy library aligned with standards like CIS, GDPR, and PCI DSS.
Frequently asked questions
What is Policy as Code (PaC)?
Policy as Code (PaC) is the practice of defining rules, constraints, and best practices in a high-level, declarative language that is stored in version control, just like application code. This allows policies to be automatically tested, validated, and enforced throughout the software development lifecycle, reducing manual errors and ensuring consistent compliance.
How is Policy as Code different from Infrastructure as Code (IaC)?
Infrastructure as Code (IaC) defines *what* infrastructure should be provisioned (e.g., servers, databases, networks). Policy as Code (PaC) defines the *rules and constraints* that the infrastructure must adhere to (e.g., no S3 buckets can be public, all disks must be encrypted). PaC tools often work by scanning and validating IaC templates to ensure they comply with defined policies.
OPA vs. Kyverno: Which one is better for Kubernetes?
It depends on your team's needs. OPA is a general-purpose engine that is extremely powerful and flexible but requires learning the Rego language. Kyverno is Kubernetes-native, using YAML for policy definitions, which makes it much simpler to adopt for teams already familiar with Kubernetes manifests. For pure Kubernetes use cases with a lower learning curve, Kyverno is often preferred; for complex, cross-stack policies, OPA is the more powerful choice.
Can I use Policy as Code for more than just security?
Absolutely. While security and compliance are primary drivers, PaC is also used to enforce operational best practices, manage costs, and ensure architectural consistency. For example, you can create policies to enforce specific resource tags for cost allocation, limit the size of virtual machines developers can provision, or ensure all deployments include required liveness probes.