Segment

Segment (now Twilio Segment) is Twilio's customer data platform (CDP) that collects, unifies, and routes customer behavioral data from websites, mobile apps, and server-side sources to analytics tools, marketing platforms, and data warehouses. Originally founded independently in 2011 by Peter Reinhardt, Calvin French-Owen, Ilya Volodarsky, and Ian Storm Taylor, Segment was acquired by Twilio in 2020 for $3.2 billion — the largest acquisition in Twilio's history — and integrated as the foundational data layer for Twilio's customer engagement platform.\n\nSegment's core product is a universal data collection API (analytics.js for web, mobile SDKs) that captures user events and identity data once, then routes it to 400+ downstream destinations — Mixpanel, Amplitude, Salesforce, Braze, Snowflake, BigQuery — without requiring separate tracking implementations for each tool. The Personas feature builds unified customer profiles from event streams, enabling personalization and audience segmentation across channels.\n\nIn 2025, Twilio Segment operates as the data infrastructure layer for Twilio's broader customer engagement suite, connecting event data collection with Twilio's messaging, voice, and email channels. The CDP market has grown competitive with Rudderstack (open-source alternative), mParticle, and cloud warehouses offering native CDP functionality. Segment's 2025 strategy focuses on deeper Twilio product integration, AI-powered audience building, and expanding its Protocols data governance capabilities for enterprise compliance.