1 Best Open Source AWS Secrets Manager Alternatives

AWS Secrets Manager stores and manages secrets such as database credentials, API keys, and tokens for applications running on AWS. It handles automatic rotation for supported database types, integrates with IAM for access control, and lets applications retrieve secrets at runtime instead of hardcoding them into configuration files.

Teams look for open-source alternatives when they need secrets management that works across multiple clouds or on-premise infrastructure, not just AWS. Secrets Manager charges per secret stored and per API call, which adds up for applications with many short-lived secrets or frequent rotation. There is also a category of teams that want a secrets store they can run and inspect themselves rather than depending on AWS IAM policies as the sole access control layer.

HashiCorp Vault is the most established open-source option for this. It stores secrets, generates dynamic short-lived credentials, and supports rotation for many database and cloud providers, similar in scope to Secrets Manager but usable across AWS, other clouds, and on-premise systems. It runs as its own service that your applications authenticate against, which means you take on responsibility for running and securing that service.

Before adopting a self-hosted secrets manager, check which secret engines and rotation integrations you actually need, since Vault's plugin system covers many providers but not every service you use out of the box. Plan for high availability, since a secrets store is a critical dependency and downtime blocks anything that needs to fetch credentials. Also review the access control and audit logging setup carefully, since misconfigured policies here expose your most sensitive credentials.