AWS Key Management Service vs AWS Vault: Side-by-Side Comparison (2026)
Features, pricing, ratings, and pros & cons — compared head-to-head.
AWS Key Management Service is a free key management tool. AWS Vault is a free key management tool. Compare features, ratings, integrations, and community reviews side by side to find the best key management fit for your security stack.
CST VerdictBased on our analysis of available product data, here is our conclusion:
AWS teams that need encryption keys tied directly to their infrastructure will find AWS Key Management Service indispensable; it integrates natively with 200+ AWS services and eliminates the operational burden of managing a separate HSM or third-party vault. AWS offers free tier usage and FIPS 140-2 Level 2 certification for the service itself, though the CloudHSM option reaches Level 3 if compliance demands it. Skip this if your organization runs multi-cloud or hybrid infrastructure requiring vendor-agnostic key management; AWS KMS locks you into AWS's envelope encryption model and won't federate keys across platforms.
Developers and security teams managing multiple AWS accounts locally should reach for AWS Vault first; it's the only free tool that keeps IAM credentials out of plaintext config files by leveraging your OS keystore, eliminating the most common path to credential exposure in development environments. With 8,960 GitHub stars and active maintenance, it's proven reliable enough that most AWS-native shops have already standardized on it. Skip this if your team doesn't use local development workflows or needs centralized credential rotation and audit logging; AWS Vault is a developer tool, not a secrets manager for applications in production.
