This article examines the performance of incubators because their economic model implies constantly finding external sources of financing. In order to evaluate the performance of incubators in France, we questioned 404 entrepreneurs in 80 incubators. The results show the social utility of incubators in France. Indeed, they encourage entrepreneurs to pass to the act of creation, but also contribute to the success of incubated firms. Moreover, these companies create more jobs than other start-ups. However, the services provided by incubators could be more developed and focus more on the assistance in order to find potential investors. Lastly, the work quality of an incubator as perceived by entrepreneurs is largely dependant on its director. This fact can explain important variations of performance between incubators.