Twilio Inc. provides a customer engagement platform comprising communications application programming interfaces. It enables developers to embed numerous forms of messaging, voice, and email interactions into their customer-facing applications, and software products that target specific engagement needs, including its customer data platform, digital engagement centers, marketing campaigns and advanced account security solutions. Its platform provides developers tools to build, scale, and deploy real-time communications within software applications. Its APIs and software products include Twilio Flex and Twilio Engage. It operates through two business units: Twilio Communications (Communications) and Twilio Data & Applications. Its communication solutions consist of customizable APIs and products that can be used individually or in combination to build rich contextual communications within applications. Its key communication offerings include Messaging, Voice, Email, Flex and others.