Can I use freely for my company needs VMware vSphere Hypervisor™, and what will be the difference with VMware vSphere Starter Kit ?
The lack of backup APIs is a big concern with the free version, as is the physical limit of 32GB RAM.
Can I use VMware vSphere Hypervisor™ with vSphere Client software free of charge ?
Yes, the vSphere Client can be used to manage the free version of ESXi.