RingCentral, Inc. is an American provider of cloud-based communication and collaboration products and services. The company is headquartered in Belmont, California with other US offices in Denver, Charlotte, and Dallas. It has international offices in Canada, the UK, France, Bulgaria, Spain, China, India, the Netherlands, Israel, Australia, South Korea, Switzerland, Germany, Ireland, and the Philippines. CEO Vlad Shmunis and CTO Vlad Vendrow founded the company in 1999. Investors included Doug Leone, Sequoia Capital, Khosla Ventures, Scale Venture Partners, and DAG Ventures. It completed its IPO in 2013. Wikipedia