vSAN is sold by VMware as a software-only solution. Server hardware must be acquired separately.
VMware maintains an extensive Hardware Compatibility List (HCL) with supported hardware for VMware vSAN implementations.
For guidance on proper hardware configurations, VMware provides a vSAN Hardware Quick Reference Guide.
You can view both the HCL and the Quick Reference Guide by using the following link: http://www.vmware.com/resources/compatibility/search.php?deviceCategory=vSAN
To help customers further, VMware also partners with multiple server hardware manufacturers to provide reference configurations in the VMware vSAN Ready Nodes document.