Best Infrastructure Policy as Code Tools in 2026
Updated
In short: Terraform is ranked #1 of 24 as of 4 October 2026, ahead of Google Cloud Terraform Policy Validation and Open Policy Agent. The best-ranked option with a free plan is Google Cloud Terraform Policy Validation. The lowest first paid tier on this page is Terraform at $0.10/mo.
Infrastructure policy as code tools give teams a way to define rules and check them at different stages of infrastructure work. Compare IaC formats and policy languages, then consider CI/CD integration, admission control, and runtime enforcement to see where checks can apply. Policy testing and reporting help distinguish how rules are validated and results surfaced. Free-plan availability and paid-from pricing add cost context. The ranking begins with Terraform and Google Cloud Terraform Policy Validation, followed by Open Policy Agent and Conftest; HashiCorp Nomad and Kubewarden are also among the first entries. Use these criteria to focus on the workflow and policy coverage your team needs.
24 infrastructure policy as code tools ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
#1 Terraform Top pick · 8.0 Free plan · $0.10/mo
#2 Google Cloud Terraform Policy Validation Runner-up · 7.4 Free plan · Free
#3 Open Policy Agent Also great · 7.4 Free plan · Free
- Free planFree trial apiLinuxmacOSself-hostedWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planFree trialPlatforms$0.10/mofirst paid tier About TerraformVisit site - Free plan LinuxmacOSWindows
- Free plan
- Yes
- Policy language
- Rego
- IaC formats
- Terraform plan JSON
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan apiLinuxmacOSself-hostedWebWindows
- Policy language
- Rego
- IaC formats
- Terraform plan JSON, JSON, YAML
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan LinuxmacOSWindows
- Free plan
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free trial apiLinuxmacOSself-hostedWindows
- Policy language
- Ruby DSL
- IaC formats
- Servers, containers, cloud APIs
- Policy testing
- Yes
RecognisedDocumentedFree planFree trialPlatforms$4.92/mofirst paid tier About Chef InfraVisit site - Free plan apiself-hostedWeb
- Free plan
- Yes
- Policy language
- Rego
- IaC formats
- Kubernetes YAML manifests and Custom Resources
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan apiLinuxmacOSself-hostedWindows
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan apiLinuxmacOSWebWindows
- Free plan
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan LinuxmacOSself-hostedWindows
- Policy language
- AWS CloudFormation Guard DSL
- IaC formats
- CloudFormation templates and change sets; Terraform JSON; Kubernetes configurations
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan LinuxmacOS
- Free plan
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan LinuxmacOSself-hostedWindows
- Free plan
- Yes
- Policy language
- YAML
- IaC formats
- Terraform
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan LinuxmacOSself-hostedWindows
- Free plan
- Yes
- Policy language
- OPA Rego
- IaC formats
- Terraform, Kubernetes, Docker, AWS CloudFormation, Ansible, Helm, Google Deployment Manager, AWS SAM, Microsoft ARM, Azure Blueprints, OpenAPI, Pulumi, Crossplane, Knative, Serverless Framework
- Policy testing
- Yes
RecognisedDocumentedFree planFree trialPlatformsFree About KICSVisit site - LinuxmacOSself-hostedWindows
- Free plan
- Yes
- Policy language
- WebAssembly-compatible languages including Rust, Go, CEL, and Rego
- IaC formats
- Kubernetes resources and admission requests in YAML/JSON
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free trial apiself-hostedWeb
- Free plan
- No
- Paid from
- 2,499 /mo
RecognisedDocumentedFree planFree trialPlatforms$2,499/mofirst paid tier About FireflyVisit site - apiLinuxmacOSself-hostedWebWindows
- Policy language
- Sentinel
- IaC formats
- Terraform configurations, states, and plans
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms - macOSLinux
- Free plan
- Yes
- Policy language
- YAML configuration; CEL expressions
- IaC formats
- Kubernetes YAML, Helm, Kustomize
- Policy testing
- Yes
RecognisedDocumentedFree planFree trialPlatforms - LinuxmacOSWindows
- Free plan
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Web
- Free plan
- Yes
- Policy language
- YAML and JSON
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms -
- Policy language
- Python
- IaC formats
- Terraform
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Free plan Linuxself-hosted
- Free plan
- Yes
- Policy language
- BDD-style feature files
- IaC formats
- Terraform plan and state output
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms -
- Free plan
- Yes
- Policy language
- JSON
- IaC formats
- Terraform plans, CloudFormation, Kubernetes, Infracost, JSON
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms - Web
- Policy language
- OPA/Rego
- IaC formats
- Terraform, Bicep, Kubernetes manifests, Helm charts
RecognisedDocumentedFree planFree trialPlatforms - Linux
- Free plan
- No
- Policy language
- Kubernetes-native YAML and CEL
- IaC formats
- Kubernetes manifests, Terraform plans, OpenTofu plans, Dockerfiles, AWS CDK, CloudFormation templates, Ansible playbooks
- Policy testing
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms -
- Free plan
- Yes
- Admission control
- Yes
RecognisedDocumentedFree planFree trialPlatforms
Is your platform on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which infrastructure policy as code tool is ranked first on The Geeks Club?
Terraform is ranked #1 of 24 with a score of 8.0. Google Cloud Terraform Policy Validation is second and Open Policy Agent third.
How many of these have a free plan?
12 of the 24 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Terraform has the lowest first paid tier we found: $0.10/mo.
How is this list ranked?
Ranked on how quickly a newcomer can get going: documentation depth, a free tier or trial, and the platforms it runs on. Paid placements never change a rank.