A startup or start up is a company initiated by individual founders or entrepreneurs to search for a repeatable and scalable business model. Founders design startups to effectively develop and validate a scalable business model. Hence, the concepts of startups and entrepreneurship are similar. However, entrepreneurship refers all new businesses, including self-employment and businesses that never intend to grow big or become registered, while startups refer to new businesses that intend to grow beyond the solo founder, have employees, and intend to grow large. Startups typically begin by a founder (solo-founder) or co-founders who have a way to solve a problem. The founder(s) of a startup will begin market validation by problem interview, solution interview, and building a minimum viable product (MVP), i.e. a prototype, to develop and validate their business models. The startup process can take a long period of time (by some estimates, three years or longer), and hence sustaining effort is required.