What are some alternatives?
When comparing Archipel and VMmanager, you can also consider the following products
Proxmox Virtual Environment - Proxmox VE is an open-source server virtualization platform to manage KVM virtual machines, LXC, software-defined storage and networking, HA clustering, and multiple other out-of-the-box tools on a single solution.
Virtualizor - Virtualizor is a powerful web based VPS Control Panel.
oVirt - oVirt is a virtualization management application.
Xen Orchestra - A complete web UI for controlling a XenServer or Xen infrastructure.
vSphere - Get started with VMware vSphere editions, the world’s leading server virtualization platform and the best foundation for your apps, your cloud, and your business.
OpenStack - OpenStack software controls large pools of compute, storage, and networking resources throughout a datacenter, managed through a dashboard or via the OpenStack API.