Cloud Custodian
Cloud Custodian: A broad, open-source policy engine for teams managing cloud compliance and remediation. Ranked #4 of 25 in Infrastructure Policy as Code Tools by our editors (9.0/10); pricing: Free plan; best for multi-cloud remediation teams.
At a glance
- Editor score9.0 / 10
- PricingFree plan
- Best forMulti-cloud remediation teams
- Free planYes
- Paid fromFree
- Policy testingYes
- Facts checked20 Sep 2026
Where it wins
- Supports AWS, Azure, Google Cloud, and Oracle Cloud Infrastructure
- Combines YAML policies, dry runs, enforcement, remediation, and reporting
- Evaluates Terraform infrastructure as code in CI with c7n-left
Where it doesn't
- Requires teams to manage and operate the open-source deployment
- CI admission-style enforcement is not a standalone deployment admission controller
- Policy reporting is limited to CSV and text-based outputs
Our verdict on Cloud Custodian
Cloud Custodian is an open-source rules engine for managing public-cloud resources and accounts. It is designed for teams that need one policy workflow across AWS, Microsoft Azure, Google Cloud Platform, and Oracle Cloud Infrastructure. Policies use YAML with resource types, filters, and actions, giving administrators a structured way to define governance, security, and cost-management rules. The project supports Windows, macOS, Linux, and self-hosted environments, with local execution, scheduled runs, and serverless event-driven enforcement.
Its open-source distribution makes the product available without a paid plan structure. The published capabilities center on policy definition, syntax validation, dry-run execution, runtime enforcement, remediation, metrics, structured resource outputs, and CSV or text-based reports. Multi-account, subscription, and project execution are included, which fits organizations operating several cloud environments. Cloud Custodian also connects policy work to infrastructure delivery through c7n-left, which evaluates Terraform configurations and supports CI workflow validation and testing. This combination makes it suitable for teams that want policy checks before deployment as well as controls over running resources.
The main strength is breadth: a single policy approach spans multiple cloud providers while covering pre-deployment evaluation, runtime enforcement, reporting, and remediation. c7n-left can fail CI runs for policy violations, supporting admission-style enforcement in CI. However, teams should distinguish that workflow from a standalone deployment admission controller, and they should expect to own the operational work associated with self-hosted, open-source software. Cloud Custodian is a strong fit for multi-cloud remediation teams that can maintain policy workflows and cloud integrations. Teams seeking a managed commercial service or a standalone deployment admission controller should choose an alternative.
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Cloud Custodian pricing
Cloud Custodian fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Policy language | YAML |
| IaC formats | Terraform |
| Policy testing | Yes |
| Admission control | Yes |
| Runtime enforcement | Yes |
| CI/CD integration | Yes |
| Policy reporting | Yes |
| Deployment | Cloud, Self-hosted |
| Platforms | Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 4 integrations: AWS, Microsoft Azure, Google Cloud Platform, Oracle Cloud Infrastructure |
| Pricing | Free plan |
| Website | cloudcustodian.io |
| Facts checked | 20 Sep 2026 |
Cloud Custodian integrations
Cloud Custodian lists 4 integrations on its own site.
- AWS
- Microsoft Azure
- Google Cloud Platform
- Oracle Cloud Infrastructure
Alternatives to Cloud Custodian
- TerraformA broad Terraform workflow for multi-cloud teams that need policy and state controls.9.4
- Azure PolicyA free Azure-native policy service with broad enforcement, remediation, and CI/CD coverage.9.3
- Open Policy AgentA broad, programmable policy engine for teams building policy platforms.9.1
See all Cloud Custodian alternatives →
Cloud Custodian vs the competition
- Cloud Custodian vs Terraform
- Cloud Custodian vs Azure Policy
- Cloud Custodian vs Open Policy Agent
- Cloud Custodian vs Checkov
- Cloud Custodian vs AWS CloudFormation Guard
- Cloud Custodian vs Firefly
Compare Cloud Custodian with any tool side by side →
Also Ranked In
Cloud Custodian is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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