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Head-to-head · Infrastructure Policy as Code Tools

Open Policy Agent vs Google Cloud Policy Controller

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Open Policy Agent #3 in Infrastructure Policy as Code Tools 9.1/10 Open source ✓ 5 of 5 features Visit site
Google Cloud Policy Controller #8 in Infrastructure Policy as Code Tools 8.6/10 Free plan Free plan✓ 5 of 5 features Visit Google Cloud

Open Policy Agent leads on 0 checks, Google Cloud Policy Controller on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreOpen Policy Agent · 9.1/10
  • Free planonly Google Cloud Policy Controller

Open Policy Agent scores higher on our rubric for infrastructure policy as code tools: 9.1 against 8.6 out of 10; our editors rank them #3 and #8.

Open Policy Agent is the better fit for teams building policy platforms. Google Cloud Policy Controller is the better fit for google Kubernetes fleet governance.

  • Open Policy Agent fits best

    Teams building policy platforms

  • Google Cloud Policy Controller fits best

    Google Kubernetes fleet governance

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Side by side

Feature Open Policy Agent 9.1/10 Visit ↗ Google Cloud Policy Controller 8.6/10 Visit ↗
At a glance
Editor score 9.1 8.6
Ranking #3 in Infrastructure Policy as Code Tools #8 in Infrastructure Policy as Code Tools
Best for Teams building policy platforms Google Kubernetes fleet governance
Pricing model Free Free
Starting price Open source Free plan
Free plan Not checked yet ✓ (best)
Free trial — —
Deployment Self-hosted Cloud
Support Community, Docs Docs, Community
Integrations 5 integrations 9 integrations
Built for Small business, Mid-market, Enterprise Mid-market, Enterprise
Features Open Policy Agent 5/5 · Google Cloud Policy Controller 5/5
Policy testing ✓ ✓
Admission control ✓ ✓
Runtime enforcement ✓ ✓
CI/CD integration ✓ ✓
Policy reporting ✓ ✓
Specs
Policy language Rego Rego
IaC formats Terraform plan JSON, JSON, YAML Kubernetes YAML manifests and Custom Resources
Our review
Pros
  • Rego supports declarative policy authoring and reusable rules
  • Covers Kubernetes, Terraform, CI/CD, APIs, and Go integrations
  • Includes testing, decision logging, and policy/data bundle loading
  • Free policy guardrails for Kubernetes clusters and fleets
  • Rego templates, admission control, audit, and dry-run modes
  • CI validation, compliance views, and centralized Config Sync distribution
Cons
  • Requires teams to author policies in the Rego language
  • The supplied platform coverage is primarily API-based
  • Open-source delivery does not include paid hosted plans
  • Focused on Kubernetes rather than general infrastructure as code
  • GKE usage and related Google Cloud services remain billable
  • No AI features or open-source distribution
Our verdict

Open Policy Agent (OPA) is an open-source, general-purpose policy engine that separates policy decisions from application logic. It is designed for teams building policy platforms across microservices, Kubernetes, CI/CD pipelines, API…

Read the review →

Google Cloud Policy Controller applies programmable security, compliance, and operational guardrails to Kubernetes clusters and workloads. It is designed for IT administrators, operators, security specialists, and platform engineers…

Read the review →
  1. Open Policy AgentInfrastructure Policy as Code Tools 9.1Open source
  2. Google Cloud Policy ControllerInfrastructure Policy as Code Tools 8.6Free plan

Strengths and trade-offs

  • Open Policy Agent — where it wins

    • Rego supports declarative policy authoring and reusable rules
    • Covers Kubernetes, Terraform, CI/CD, APIs, and Go integrations
    • Includes testing, decision logging, and policy/data bundle loading

    Where it doesn't

    • Requires teams to author policies in the Rego language
    • The supplied platform coverage is primarily API-based
    • Open-source delivery does not include paid hosted plans

  • Google Cloud Policy Controller — where it wins

    • Free policy guardrails for Kubernetes clusters and fleets
    • Rego templates, admission control, audit, and dry-run modes
    • CI validation, compliance views, and centralized Config Sync distribution

    Where it doesn't

    • Focused on Kubernetes rather than general infrastructure as code
    • GKE usage and related Google Cloud services remain billable
    • No AI features or open-source distribution
  • Open Policy Agent9.1/10 · Open source

    A broad, programmable policy engine for teams building policy platforms.

    Visit siteFull verdict →
  • Google Cloud Policy Controller8.6/10 · Free plan

    A focused, free policy layer for governing Kubernetes fleets with Rego and admission control.

    Visit Google CloudFull verdict →

More comparisons

All infrastructure policy as code tools comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update