This document compares OpenStack and VMware vCloud. It provides an overview of each platform, including technical specifications like supported hypervisors, storage, networking and APIs. It also discusses non-technical factors such as costs, skills required, industries suited for each, and when an organization should choose one over the other. OpenStack is open source and supports a variety of hypervisors, while vCloud only supports ESXi and has proprietary APIs. OpenStack is best for large cloud providers while vCloud is suited for traditional enterprise workloads in organizations with the budget for licensing.