Rapleaf is a San Francisco-based startup that collects data on over 1 billion email records and 450 million consumers to help companies better understand their customers and deliver personalized experiences. Rapleaf's platform integrates data from social networks, business networks, and other online and offline sources to provide insights into customers' demographics, interests, behaviors, social connections and influence. This data enables companies to engage customers more meaningfully through targeted advertising, personalized content, and social media marketing strategies.