Scalable startups are the work of traditional technology entrepreneurs. These entrepreneurs start a company believing their vision will change the world and result in a company with hundreds of millions if not billions of dollars in sales. The early days of a scalable startup are about the search for a repeatable and scalable business model. Scale requires external venture-capital investment in the tens of millions to fuel rapid expansion. Scalable startups tend to cluster in technology centers such as Silicon Valley, Shanghai, New York, Bangalore, and Israel and make up a small percentage of entrepreneurs, but their outsize return potential attracts almost all the risk capital (and press).