Access Undenied on AWS vs Cloud Custodian (c7n): Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
Access Undenied on AWS is a free cloud security posture management tool. Cloud Custodian (c7n) is a free cloud security posture management tool. Compare features, ratings, integrations, and community reviews side by side to find the best cloud security posture management fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
AWS security teams drowning in AccessDenied noise will find real value in Access Undenied on AWS because it converts CloudTrail denial events into actionable least-privilege fixes instead of leaving you to guess why a request failed. The tool is free and lives on GitHub with 264 stars, so adoption friction is near zero and you can audit the code yourself. Skip this if your organization needs a full CSPM platform; Access Undenied solves one problem exceptionally well and doesn't pretend to be a posture scanner.
Platform engineering teams managing multi-cloud infrastructure at scale will get the most from Cloud Custodian because its YAML-based policy engine lets you write once and enforce across AWS, Azure, and GCP simultaneously, something most CSPM tools force you to configure separately. 5,794 GitHub stars and active community contributions mean you're inheriting battle-tested policies rather than starting from scratch. Not the right fit if you need point-and-click policy management or expect vendor support; Cloud Custodian demands engineering resources to deploy and maintain, and you're responsible for the policy logic.
