RingCentral is a unified-communication-as-a-service, or UCaaS, provider. RingCentral's software provides an easy-to-use, integrated communication application that allows for a single user experience across mobile and desktop applications. The software lets businesses communicate and collaborate using voice, video, text, Internet messaging, and conference calls on a single platform. Ninety percent of RingCentral's revenue comes from its RingCentral Office application, which is available in four tiers based on integration needs and the number of employees. The company was founded in 1999 and its headquarters are in Belmont, California.