Twilio Inc., together with its subsidiaries, provides customer engagement platform solutions in the United States and internationally. It operates through two segments, Twilio Communications and Twilio Segment. The company provides various application programming interfaces and software solutions for communications between customers and end users, including messaging, voice, email, flex, marketing campaigns, and user identity and authentication. It also offers software products to build direct, personalized relationships with their end users, such as segment, a platform that provides tools for first-party data by unifying real-time information collected; and engage, an automation platform for the delivery of omnichannel campaigns. Twilio Inc. was incorporated in 2008 and is headquartered in San Francisco, California.