ESXi is often told to be a free hypervisor. I’ve mentioned in my previous post that there are actually two free ESXi versions: Evaluation and Free. The thing is, both have several limitations that make them unfit for production use. The former has a 60-day time limit, but it provides all the ESXi features. The latter, in its turn, has no time limits, but it lacks many cool hypervisor features. With all that being said, it becomes clear why you just buy from VMware at some point even though you are potentially good to go with any of those free licenses.