KVM vs Qemu: What are the differences?
What is KVM? Kernel-based Virtual Machine is a full virtualization solution for Linux. KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V).
What is Qemu? A generic and open source machine emulator and virtualizer. When used as a machine emulator, it can run OSes and programs made for one machine (e.g. an ARM board) on a different machine (e.g. your own PC). By using dynamic translation, it achieves very good performance When used as a virtualizer, it achieves near native performance by executing the guest code directly on the host CPU. it supports virtualization when executing under the Xen hypervisor or using the KVM kernel module in Linux. When using KVM, it can virtualize x86, server and embedded PowerPC, 64-bit POWER, S390, 32-bit and 64-bit ARM, and MIPS guests..
KVM and Qemu can be primarily classified as "Virtualization Platform" tools.
According to the StackShare community, KVM has a broader approval, being mentioned in 16 company stacks & 21 developers stacks; compared to Qemu, which is listed in 4 company stacks and 6 developer stacks.