GridGain Nebula provides two different approaches you can use to work with GridGain clusters.
With managed clusters, GridGain Nebula handles hosting the cluster on its own. Your clusters will be hosted in AWS cloud, and cluster management will be handled by GridGain support team, including upgrading software, patching, monitoring, provisioning, recovering from outages and optimizing performance.
You are provided with a 500$ credit to try out managed clusters. To start using managed clusters, follow the Managed Clusters tutorial.
Unlike managed clusters, attached clusters are GridGain clusters run on your hardware, and are managed by you. They provide all the benefits of having software that runs on a known hardware, but also require you to handle optimization and upgrades yourself.
For more information on how to attach a cluster, follow the Attached Clusters tutorial.