Best Open Policy Agent Gatekeeper Alternatives in 2026
The top Open Policy Agent Gatekeeper alternatives are Terraform, Azure Policy and Open Policy Agent: 15 infrastructure policy as code tools our editors would look at instead of Open Policy Agent Gatekeeper, in our ranking order.
Open Policy Agent Gatekeeper: A focused, open-source controller for validating and mutating self-hosted Kubernetes resources. Where it falls short: requires self-hosted kubernetes deployment and operations.
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Best forMulti-cloud Terraform teams
A broad Terraform workflow for multi-cloud teams that need policy and state controls.
9.4/10★★★★★Visit Terraform -
Best forAzure governance teams
A free Azure-native policy service with broad enforcement, remediation, and CI/CD coverage.
- Runtime enforcement
- Admission control
- Policy testing
9.3/10★★★★★Visit Azure Policy -
Best forTeams building policy platforms
A broad, programmable policy engine for teams building policy platforms.
- Runtime enforcement
- Admission control
- Policy testing
9.1/10★★★★★Visit site -
Best forMulti-cloud remediation teams
A broad, open-source policy engine for teams managing cloud compliance and remediation.
- Runtime enforcement
- Admission control
- Policy testing
9.0/10★★★★☆Try Cloud Custodian -
Best forOpen-source IaC scanning teams
A broad open-source scanner for preventive IaC security and compliance checks.
8.9/10★★★★☆Visit Checkov -
Best forAWS policy validation teams
A focused, open-source validator for AWS and multi-format infrastructure policy checks.
- Admission control
- Policy testing
- CI/CD integration
8.8/10★★★★☆Visit site -
Best forEnterprise multi-cloud IaC governance
Enterprise multi-cloud governance with orchestration, drift remediation, and policy controls.
8.7/10★★★★☆Visit Firefly -
Best forGoogle Kubernetes fleet governance
A focused, free policy layer for governing Kubernetes fleets with Rego and admission control.
- Runtime enforcement
- Admission control
- Policy testing
8.6/10★★★★☆Visit Google Cloud -
Best forBroad IaC static analysis
A free CLI for broad IaC scanning, customizable policies, secrets detection, and CI/CD reporting.
- Policy testing
- CI/CD integration
- Policy reporting
8.5/10★★★★☆Visit KICS -
Best forKubernetes admission policy teams
Open-source Kubernetes admission control with WebAssembly policies and built-in auditing.
- Runtime enforcement
- Admission control
- Policy testing
8.4/10★★★★☆Visit Kubewarden -
Best forTerraform enterprise policy enforcement
A focused Sentinel framework for enforcing Terraform and HashiCorp product policies.
- Runtime enforcement
- Admission control
- Policy testing
8.3/10★★★★☆Visit HashiCorp -
Best forAWS infrastructure policy workflows
A free, AWS-native option for managed infrastructure templates, previews, and drift detection.
8.2/10★★★★☆Visit site -
Best forLightweight Rego checks in CI
A focused, open-source CLI for Rego checks across Terraform and Kubernetes.
8.1/10★★★★☆Visit Conftest -
Best forKubernetes-native policy operations
Open-source policy operations for validating, mutating, and scanning Kubernetes resources.
- Admission control
8.0/10★★★★☆Visit Kyverno -
Best forCompliance testing across infrastructure
A flexible Ruby-based compliance testing framework for servers, containers, and cloud resources.
- Policy testing
- CI/CD integration
- Policy reporting
7.9/10★★★★☆Visit Chef InSpec
Open Policy Agent Gatekeeper Alternatives: Common Questions
What is the best alternative to Open Policy Agent Gatekeeper?
Terraform: #1 in our Infrastructure Policy as Code Tools ranking, with an editor score of 9.4 out of 10. A broad Terraform workflow for multi-cloud teams that need policy and state controls.
Is there a free alternative to Open Policy Agent Gatekeeper?
Yes. Terraform, Azure Policy, Open Policy Agent, Cloud Custodian and Checkov have a free plan or a free tier (13 of the 15 alternatives on this page).
Open Policy Agent Gatekeeper vs Each Alternative
| # | Tool | Free plan | Paid from | Policy language | IaC formats | Policy testing | Admission control | Score |
|---|---|---|---|---|---|---|---|---|
| 18 | Open Policy Agent Gatekeeper | Yes | None | — | — | — | Yes | 7.6 |
| 1 | Terraform | Yes | — | — | — | — | — | 9.4 |
| 2 | Azure Policy | Yes | None | JSON | ARM templates, Bicep, Terraform | Yes | Yes | 9.3 |
| 3 | Open Policy Agent | — | None | Rego | Terraform plan JSON, JSON, YAML | Yes | Yes | 9.1 |
| 4 | Cloud Custodian | Yes | None | YAML | Terraform | Yes | Yes | 9.0 |
| 5 | Checkov | Yes | None | — | — | — | — | 8.9 |
| 6 | AWS CloudFormation Guard | — | None | AWS CloudFormation Guard DSL | CloudFormation templates and change sets; Terraform JSON; Kubernetes configurations | Yes | Yes | 8.8 |
| 7 | Firefly | No | $2,499/mo | — | — | — | — | 8.7 |
| 8 | Google Cloud Policy Controller | Yes | None | Rego | Kubernetes YAML manifests and Custom Resources | Yes | Yes | 8.6 |
| 9 | KICS | Yes | None | OPA Rego | Terraform, Kubernetes, Docker, AWS CloudFormation, Ansible, Helm, Google Deployment Manager, AWS SAM, Microsoft ARM, Azure Blueprints, OpenAPI, Pulumi, Crossplane, Knative, Serverless Framework | Yes | — | 8.5 |
| 10 | Kubewarden | Yes | None | WebAssembly-compatible languages including Rust, Go, CEL, and Rego | Kubernetes resources and admission requests in YAML/JSON | Yes | Yes | 8.4 |
| 11 | HashiCorp Sentinel | — | — | Sentinel | Terraform configurations, states, and plans | Yes | Yes | 8.3 |
| 12 | AWS CloudFormation | Yes | — | — | — | — | — | 8.2 |
| 13 | Conftest | Yes | None | — | — | — | — | 8.1 |
| 14 | Kyverno | — | None | — | — | — | Yes | 8.0 |
| 15 | Chef InSpec | — | None | Ruby DSL | Servers, containers, cloud APIs | Yes | — | 7.9 |
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update