Twilio

Twilio is reinventing telecommunications by merging the worlds of cloud computing, web services and telecommunications. It hosts a telephony infrastructure web service in the cloud, allowing web programmers to integrate phone calls and SMS messages into their applications. Twilio's application programming interface (API) minimizes the learning curve required to build advanced, reliable communications applications; and its pay-as-you-go pricing model means customers pay for capacity only when they need it, not before. The company is funded by Bessemer Venture Partners, Union Square Ventures, Founders Fund, Mitch Kapor and other investors, and is headquartered in San Francisco, California.