I was chatting with a customer yesterday on their Network Infrastructure Consolidation effort when the topic turned to the features of the VMware vSphere product line. 

I found this comparison chart on the VMware web site and want to share it.  It includes all the product editions from the free ESXi – Single Server, the Essentials products for up to three physical host and the vSphere product line for the larger SMB to enterprise customers. 

It is important to point out that the High Availability feature starts and the Essential Plus Edition.  This is a key feature that allows for cost effective Business Continuity and Disaster Recovery.

Below is the link to the VMware vSphere Editions Comparison

http://www.vmware.com/products/vsphere/buy/editions_comparison.html