As was noticed in previous answer, AWS is required for using Bamboo in Cloud. It is however not necessary if you're running Bamboo server.
For server, there are more agent types to choose: local agents (run on the same machine as the server node), remote agents (usually run in the same local network), or elastic agents (on EC2 from AWS) - as an option, not necessity.
As per the below documentations, AWS is a fundamental requirement to use Bamboo Cloud:
Over the next several weeks we'll be sharing some of our Getting Started guides here in the community. Throughout this series of posts, we'd love to hear from customers and non-customers ab...
Connect with like-minded Atlassian users at free events near you!Find a group
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no AUG chapters near you at the moment.Start an AUG
You're one step closer to meeting fellow Atlassian users at your local meet up. Learn more about AUGs