QEMU (short for Quick Emulator) is a free and open-source hosted hypervisor that performs hardware virtualization QEMU is a hosted virtual machine monitor. Developed by Fabrice Bellard
License: Open Source
OpenStack is a comprehensive open-source cloud computing platform that provides a wide array of features for building and managing cloud infrastructure, while QEMU is a lightweight virtualization solution focused on efficient hardware emulation. OpenStack is best suited for large-scale cloud environments, whereas QEMU excels in scenarios requiring simple and efficient virtualization.