Often I get the question what the difference is between Vmware ESX and VMware ESXi. The biggest difference off course is the price. Where VMware ESXi is free to download and use, VMware ESX cost a lot of money. On the internet I found a site that explains the differences more then only the price. http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1006543 Enjoy it.