Twilio Inc., together with its subsidiaries, offers 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 authentication and identity. It also offers software products to build direct and personalized relationships with their end users, such as segment, a platform that provides tools to harness the power of contextual data by unifying real-time information collected comprising connections, protocols, unify, engages, and AI capabilities components.