OpenStack is a free and open-source software platform for cloud computing, mostly deployed as infrastructure-as-a-service (IaaS), whereby virtual servers and other resources are made available to customers.
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.