Segment is the pioneer of the customer data platform (CDP) category, founded in 2011 in San Francisco, California, USA, and acquired by Twilio for $3.2 billion in 2020, routing customer events to 400+ destinations through a single API across Connections, Protocols, Engage, and Unify.
Bloomreach is a digital experience platform (DXP) founded in 2009 that unifies headless CMS, AI search and personalization, and a customer data platform (CDP), serving 1500+ enterprise customers. It started as the open source Java CMS (Hippo) and is known for AI-driven e-commerce content and customer experiences.
RudderStack is an open-source customer data platform (CDP) founded in 2019 in San Francisco, California, USA, providing a Segment-compatible data pipeline with warehouse-first architecture and 500+ downstream integrations, available as free self-hosting or cloud.