ACRN Hypervisor vs OpenNebula

ACRN Hypervisor is a free, open-source Type 1 hypervisor stack for embedded IoT development. It runs directly on Intel x86 bare-metal hardware and supports Linux, Windows and RTOS guests such as Zephyr; the project also lists VxWorks, Xenomai, Celadon and Android. CPU, I/O and networking virtualization are included, with I/O mediators for sharing graphics and audio across virtual machines. Resource partitioning is designed for safety-critical and non-safety-critical domains to coexist on one system-on-chip. The ACRN Device Model provides virtual device emulation. The project describes a codebase under 40K lines and reports low latency, fast boot times and responsive hardware communication. ACRN uses the BSD 3-Clause license, offers a command-line management interface and supports nested virtualization. Source code is maintained in a public GitHub repository with online documentation. Community help is available through mailing lists, IRC channels and monthly technical meetings.

OpenNebula is an open-source cloud and virtualization management platform for infrastructure across on-premises, public-cloud, and edge environments. Its control plane brings KVM virtual machines and Kubernetes clusters together, and it also supports LXC container virtualization. High-availability features include redundant control-plane components, hypervisor-node failover, and VM replication and recovery workflows across data centers. Management options include a web GUI, command-line tools, and REST, gRPC, and XML-RPC APIs. OpenNebula runs on major Linux distributions including RHEL, Ubuntu, Debian, and AlmaLinux. GPU scheduling with vGPU and MIG supports AI and HPC workloads. The maker lists integrations such as NVIDIA Spectrum-X, SUSE, NetApp, Veeam, and Everpure, as well as certified hosted-cloud providers. The Community Edition is free, while certain tested and certified enterprise releases are subscriber-only. Enterprise subscriptions include unlimited CPUs, cores, and VMs; Standard support is 9×5 and Premium support is 24×7 in CET and EST. Subscription pricing is by tailored proposal, with no price stated.