AWS Directory Service
AWS Directory Service lets you host and manage Active Directory in the cloud. It handles the heavy lifting of directory infrastructure so you don’t have to build it from scratch. This is a core security component for organizations needing centralized identity management without managing physical servers.
It fits teams already invested in the AWS ecosystem who need a managed AD solution. Since there is no free tier, you will pay for usage from day one. The pricing model requires contacting sales, which adds friction for small teams testing the waters before committing to a budget.