That of Startup is a little-known topic, to which sometimes is not given enough importance. However, the study found that they are a first step in developing new businesses, with the aim of growing more and more. Precisely for this reason, the Amazon case was addressed in the dissertation, born just as a startup inside a garage, it shows how a firm born as start-up can grow over the years and achieve significant goals after years. Financial supports are needed to achieve the objectives set from the beginning of the birth of a startup, in fact the issue of investors was addressed, in particular the Business Angel and the Venture Capital to understand how entrepreneurs can start a startup since the beginning and how they should operate within a startup.