Sopro is a privately held marketing technology company founded in 2015 by Rob Harlow and Ryan Welmans, headquartered in Brighton, United Kingdom. It specializes in fully managed multi-channel B2B prospecting services, empowering businesses—ranging from startups to enterprises—to discover, engage, and initiate high-quality conversations with potential clients. By combining human-led expertise with AI-powered data and intent signals, Sopro coordinates campaigns across email, LinkedIn messaging, social display ads, phone outreach, physical mail, and live chat. This integrated approach delivers...