vSphere 6.5 has been released and as known from previous versions, VMware provides a free version of their Hypervisor ESXi for everyone again. The license key can be created for free at VMwares website. It has no expiration date. The binaries you will receive as "Free Hypervisor" are 100% identical to the paid version.

Limitations

No support

Free ESXi cannot be added to a vCenter Server

2 physical CPUs

Unlimited cores per CPU

Unlimited physical Memory

max. 8 vCPU per VM