What is the difference between bare-metal (hypervisor-based) and host virtualization types ?
Difference between bare metal (hypervisor based) and host virtualization types
11.2k Views Asked by Relu Mesaros AtThere are 3 best solutions below

Bare Metal Servers
• Servers that are physical and dedicated to a single tenant
• Bare metal servers are Fast provisioning servers and custom-based servers
• They are Physically isolated, powerful, consistent, scale seamlessly.
• Ted is faster than Virtual servers.
• Bare metal servers can offer better performance and security for certain workloads and are more ideal for heavy workloads.
Host Virtual Server
• Easily deployed, can be created on shared or dedicated infrastructure, customizable, can be provisioned quickly, scalable, and integrated seamlessly.
• Some of the deployment options: public virtual servers, transient virtual servers, and dedicated virtual servers.
• Host Virtual servers provision more quickly and offer a more flexible and scalable environment than bare metal.
A well-known example of a hosted hypervisor is Oracle VM VirtualBox. Others include VMWare Server and Workstation, Microsoft Virtual PC, KVM, QEMU and Parallels. rest is over here
Can I say openstack is relying on hosted virtualization as KVM,qemu is listed in this branch