We have not tested any specific cloud hosting platform but are aware that there are customers that have had success hosting with Azure. However, as long as the requirements below are met, using any cloud hosting platform should be possible.
The RadioServer is provided as a virtual Debian disk image (VMDK format), so as long as the cloud service allow hosting (or importing) this image format and allow the necessary network traffic needed then hosting the RadioServer virtual image should be possible.
Note that the RadioServer needs to see UDP broadcasts from the Mimer Network Interfaces and send UDP unicasts to them, as well as being able to receive remote TCP connections from a Mimer SoftRadio client or Mimer NetworkRepeater.