Apache Mesos is an open-source project to manage computer clusters. Developed by The Apache Software Foundation
License: Open Source
Apache Mesos is primarily a resource management and container orchestration platform designed for scalability and high availability in large data centers, while virt-manager is focused on managing virtual machines with a user-friendly interface, suitable for smaller environments. Mesos is ideal for complex, distributed applications, whereas virt-manager excels in desktop and small server virtualization.