Wikipedia
RingCentral
RingCentral is a publicly traded provider of cloud-based phone systems for businesses. It is headquartered in Belmont, California and has offices in Denver, Colorado; Charlotte, NC; Toronto, Canada; Singapore; Manila, Philippines; Xiamen, China; St. Petersburg, Russia; Boca Raton, Florida and Odessa, Ukraine.
RingCentral CEO Vlad Shmunis founded the company in 1999. RingCentral investors included Doug Leone, Sequoia Capital, David Weiden, Khosla Ventures, Rob Theis, Scale Venture Partners, Bobby Yerramilli-Rao, Hermes Growth Partners and DAG Ventures. It completed its IPO in 2013.