Cloud Custodian

Cloud Custodian (c7n) is an open-source, cloud-native rules engine for managing public cloud accounts and resources. It enables users to define policies in simple YAML files to ensure well-managed, secure, and cost-optimized cloud infrastructure. It supports major cloud providers like AWS, Azure, and GCP, and can execute policies in real-time (via serverless functions) or periodically (via scheduled jobs). The current version is 0.9.50, and it maintains an active release cadence with frequent updates and feature additions.