Twilio helps customers weave communication capabilities into its services seamlessly. The company develops application programing interfaces (APIs) that software developers can plug into applications to add voice, text, and video communications as well as identity authentication. Uber uses Twilio to communicate with drivers and Nordstrom sales people use it to communicate with customers. Messaging service WhatsApp is Twilio’s biggest customer. The company offers its services through its Progammable Communications Cloud, Super Network, and Business Model for Innovators platforms. Most of its sales are from customers in the US. A June 2016 initial public stock offering raised $150 million.