What are some alternatives?
When comparing Archipel and Scalr, you can also consider the following products
Virtualizor - Virtualizor is a powerful web based VPS Control Panel.
OpenNebula - The Simplest Cloud Management Experience
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.
Morpheus - Morpheus is integration software designed to help major cloud infrastructure work in harmony. For example, if a company has assets on both Google's and Amazon's cloud services, Morpheus helps bridge the gap to improve productivity.
VMmanager - VMmanager is a virtualization management software, which presents a perfect tool for creating virtual machines, providing VPS services and building cloud infrastructure.
RightScale - RightScale enables organizations to easily deploy and manage business-critical applications across public, private and hybrid clouds.