Open Policy Agent

Open Policy Agent is ranked #3 of 24 in infrastructure policy as code tools on The Geeks Club. It runs on API, Linux, macOS, Self-hosted, Web, Windows. There is a free plan.

Open Policy Agent plans and pricing

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Open Policy Agent Free Open-source policy engine · Apache License, Version 2.0 openpolicyagent.org · 3 Oct 2026

Compared on infrastructure policy as code tools

Policy language: Rego
IaC formats: Terraform plan JSON, JSON, YAML
Policy testing: Yes
Admission control: Yes
Runtime enforcement: Yes
CI/CD integration: Yes
Policy reporting: Yes

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Open Policy Agent

Policy engine: OPA is an open source, general-purpose policy engine that separates policy decision-making from policy enforcement.
Use cases: OPA can enforce policies in microservices, Kubernetes, CI/CD pipelines, and API gateways.
Integration options: OPA supports policy evaluation through a REST API, a Go API, WebAssembly, and custom evaluators using its intermediate representation.
Policy management: OPA provides management interfaces for distributing policies, checking status and health, and collecting decision logs.
Kubernetes: The OPA documentation recommends OPA Gatekeeper for Kubernetes admission control.
Downloads: The official installation guide provides options for macOS, Linux/Unix, Windows, and Docker.
Binary checksums: The installation guide says binary checksums are available by appending .sha256 to the binary filename.
API security: OPA's security guidance describes TLS, authentication, and Rego-based authorization, and says authentication and authorization are off by default.
Security reporting: The security policy asks users to report suspected security issues to the OPA security team by email.
Community support: The official site links to an OPA Slack community for users to talk with other users and maintainers.
Project status: OPA is a graduated Cloud Native Computing Foundation project.
Purpose: OPA is an open-source, general-purpose policy engine that unifies policy enforcement across software systems.
Decision input and output: OPA evaluates policies against arbitrary structured input and can return arbitrary structured data as output.
Policy evaluation: Policies can be evaluated through a REST API, the Go API, WebAssembly runtimes, or custom evaluators using OPA's intermediate representation.
Price from: Free

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Where it ranks on The Geeks Club

Best Infrastructure Policy as Code Tools in 2026#3 of 24

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Sources

openpolicyagent.org/docs· checked 2 Oct 2026
openpolicyagent.org/docs/integration· checked 2 Oct 2026
openpolicyagent.org/docs/kubernetes· checked 2 Oct 2026
openpolicyagent.org/docs/security· checked 2 Oct 2026
openpolicyagent.org/security· checked 2 Oct 2026
openpolicyagent.org· checked 2 Oct 2026
openpolicyagent.org/ecosystem· checked 3 Oct 2026
openpolicyagent.org/support· checked 3 Oct 2026