For online retailers and service providers, the time between authorizing a card payment and shipping goods or providing a service is steadily shrinking. This makes instant decisions on fraud fighting even more important in an era when stolen card credentials are so readily available to criminals. Ravelin is a card-not-present fraud fighter that uses machine learning. The company launched its first product in 2016 but is already delivering 100 million fraud scores a month from prospective buyers in 67 countries. Its first customers were on-demand merchants—Uber-like ride services and food ...