In this white paper, IHS Infonetics Research discusses how businesses are steadily migrating voice and Unified Communications (UC) to a hosted cloud model. This trend enables seamless use of emails, text messages, instant messages, voice and video—from anywhere. However, key business applications largely remain in their own silos. The paper describes the next wave of unification, which involves integrating applications—from Salesforce to custom-built software—with voice communications in the cloud. It describes one company’s success with integrating cloud UC from RingCentral and Microsoft Office 365. Finally, the research sets out criteria for choosing a cloud provider.