Silverpop Systems (now Acoustic) is a real-time behavioural marketing platform based in Atlanta that helps B2C businesses engage customers across email, SMS, WhatsApp, and mobile app channels. The platform captures customer behaviour as it happens, then automatically triggers timely, relevant messages at the right moment across multiple channels. Acoustic works particularly well for retail, ecommerce, travel, hospitality, financial services, and media companies that need to respond quickly to customer signals. Consider referring them if your clients want to improve campaign speed and customer engagement through real-time behavioural data rather than traditional campaign scheduling.