This document provides an overview and evaluation criteria for Gartner's 2014 Magic Quadrant for cloud infrastructure as a service (IaaS). It defines cloud IaaS and distinguishes it from other cloud services. The document evaluates IaaS providers based on their ability to execute and completeness of vision. Key criteria include availability, scalability, security, pricing and support. While the IaaS market continues rapid growth, strategic provider selection is important given the immaturity of some offerings.