VirtualBox alternatives and similar tools

Based on the "Virtualization" category.

Vagrant

9.5 9.4 L2 VirtualBox VS Vagrant

Vagrant is a tool for building and distributing development environments.
QEMU

9.1 10.0 L2 VirtualBox VS QEMU

Official QEMU mirror. Please see https://www.qemu.org/contribute/ for how to submit changes to QEMU. Pull Requests are ignored. Please only use release tarballs from the QEMU website.

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Packer

9.0 9.4 VirtualBox VS Packer

Packer is a tool for creating identical machine images for multiple platforms from a single source configuration.
Otto

7.5 1.1 VirtualBox VS Otto

DISCONTINUED. Development and deployment system designed as the successor to Vagrant.
Ganeti

4.4 8.3 L2 VirtualBox VS Ganeti

Ganeti is a virtual machine cluster management tool built on top of existing virtualization technologies such as Xen or KVM and other open source software.
XenServer

4.2 9.2 L2 VirtualBox VS XenServer

DISCONTINUED. XenCenter, the Windows management console for XenServer
oVirt

4.1 6.8 VirtualBox VS oVirt

oVirt website
OpenNode

1.7 VirtualBox VS OpenNode

Builds open-source infrastructure management software and implements cloud systems.
KVM

- VirtualBox VS KVM

Linux kernel virtualization infrastructure.
Proxmox VE

- VirtualBox VS Proxmox VE

Complete open source virtualization management solution.
XCP-ng

- VirtualBox VS XCP-ng

Based on Citrix XenServer, XCP-ng is a fully open source virtualization platform.
Xen

- VirtualBox VS Xen

Virtual machine monitor for 32/64 bit Intel / AMD (IA 64) and PowerPC 970 architectures.
ConVirt

- VirtualBox VS ConVirt

Provides the core functionality for centrally managing your KVM or Xen virtualized environment.