Guesswork is a product recommendation engine. We help e-commerce sites to recommend products for their new users. Ecommerce companies spend millions of dollars in advertisements to attract users to their site. 95% of those users who visit the site, don't sign up or engage. Without engagement history, existing recommendation engines don't work. Guesswork is a unique recommendation engine that works for these users without history. We analyze the demographic and social profile of users to recommend products. Our recommendation doubles conversion in e-commerce sites. Customers: ZALORA, ebay, Zivame, Mahindra Babyoye, Linio, MapEmall.