Twilio

Twilio is a cloud communications platform that provides APIs enabling developers to embed voice, messaging, video, and email capabilities directly into their applications. It serves software developers and businesses across industries, from startups to large enterprises, that need programmable communication tools without building infrastructure from scratch. Core products include SMS and messaging APIs, voice calling and IVR systems, video conferencing tools, email delivery through SendGrid, and authentication services for identity verification. The platform also offers Twilio Flex, a customizable contact center solution, and Segment, a customer data platform for unifying user data across touchpoints. Companies use Twilio to power use cases such as two-factor authentication, appointment reminders, customer support chat, marketing notifications, and call routing, paying based on usage rather than fixed licensing fees.