Sailthru

A leading personalization-focused marketing platform for media publishers and retail brands, now part of Zeta Global's enterprise marketing cloud

Sailthru is a cross-channel personalization and marketing automation platform that helps brands deliver individualized experiences across email, web, and mobile channels. Founded in 2008, the company built its reputation on sophisticated predictive personalization technology that analyzes individual user behavior to optimize content delivery, send-time optimization, and lifecycle marketing — particularly for media publishers and e-commerce retailers. Its platform enables marketers to orchestrate customer journeys with a high degree of data-driven precision, making it a notable player in the marketing cloud and customer engagement space. Sailthru has historically served a strong base of media and publishing companies as well as retail and e-commerce brands, differentiating itself through deep personalization capabilities and a focus on first-party data utilization. The company was acquired by CM Group (later rebranded as Marigold), which consolidated it alongside other email and marketing platforms including Campaign Monitor, Emma, and Cheetah Digital. This positioned Sailthru as part of a broader enterprise marketing suite targeting mid-market and enterprise customers. In November 2025, Zeta Global acquired Sailthru as part of a $325 million transaction covering Marigold's enterprise business portfolio. Under Zeta Global's ownership, Sailthru continues to operate as a distinct platform, now integrated into Zeta's broader data-driven marketing cloud ecosystem. The acquisition strengthens Zeta Global's cross-channel marketing capabilities and expands its footprint in the media and retail verticals that Sailthru has long served.