What are some alternatives?
When comparing Apache CloudStack and Xen Orchestra, you can also consider the following products
OpenNebula - The Simplest Cloud Management Experience
VMmanager - VMmanager is a virtualization management software, which presents a perfect tool for creating virtual machines, providing VPS services and building cloud infrastructure.
OpenStack - OpenStack software controls large pools of compute, storage, and networking resources throughout a datacenter, managed through a dashboard or via the OpenStack API.
Virtualizor - Virtualizor is a powerful web based VPS Control Panel.
LINK Datacenter - LINK Datacenter owns and operates one of the largest data centers in Egypt.
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.