Can I perform backups of VMs on VMware ESXi Free Hypervisor hosts?

Yes, you can perform hot backups of virtual machines running on VMware ESXi Free Hypervisor hosts.
Free Hypervisor hosts doesn’t support VDDK libraries, so you can only perform full backups of the disks, always with thick provisioning. Uranium allows to reduce the space occupation enabling the compression.

Feature available in the Pro Virtual and Gold editions.