Twilio

Cloud Communications · Customer Data Platforms · San Francisco, USA

Twilio is a cloud-based customer engagement platform for businesses and developers. Its APIs embed messaging, voice, email, video, and authentication in customer-facing applications, while Flex supports digital engagement centers and Segment collects, unifies, and activates customer data for personalized interactions.

Customers range from self-service developers to large enterprises. Twilio earns revenue through usage-based fees—such as per-message and call-minute charges—and subscriptions for products including Segment and Email; usage fees accounted for 74% of 2025 revenue.