AWS Key Management Service (KMS)
AWS Key Management Service handles the creation and control of encryption keys. It is a managed security service that lets you manage cryptographic assets without running your own hardware. The platform provides a straightforward way to secure data by centralizing key lifecycle management within your AWS environment.
This fits teams needing centralized key governance without operational overhead. It is always free, which is a nice perk for small projects. However, the free tier has limits on the number of keys you can create. If you scale up significantly, you will eventually hit those constraints and need to plan for costs.