The unicorns share all. What does it take to build a billion-dollar company? 12 founders share the do-or-die moments behind some of the world's biggest success stories. Some of the most fascinating figures of our time are the founders who turned start-ups into globally known “unicorns”, companies valued at over a billion dollars. Exit Stories features 12 of these – each of whom solved a problem in a way no one else dared. From talking toys to pizza to the human genome, there are millions to be made out there. Discover what it takes to create an international giant – the eureka moments, the seemingly endless drudgery, and the mistakes that almost ended it all. Tonies • PATRIC FASSBENDER Just Eat • JESPER BUCH JFrog • FRED SIMON 23andMe • LINDA AVEY Rovio • PETER VESTERBACKA Delivery Hero • LUKASZ GADOWSKI Visma • ØYSTEIN MOAN Booking.com • KEES KOOLEN Trulia • SAMI INKINEN Unity • DAVID HELGASON Fiverr • MICHA KAUFMAN Pipedrive • RAGNAR SASS Anssi Kiviranta and Matias Mäenpää are a pair of hugely successful Finnish founders on a mission to spread the gospel of entrepreneurship.