Small businesses development have been a relevant topic of researches, gathering small businesses owners, academic researchers, consultants and government agencies linked to economic development. The main interest is to understand the growth process and how the small businesses reach a sustainable growth (CHAN 2006).At the same time, in a high competitive and dynamic market, strategic alliances have been more and more adopted to build competitive advantage for the companies, especially in the last two decades and particularly in technology intensive industries (HAGEDOORM 1993).The establishment of ties of cooperation among Brazilian small and medium companies, through the encouragement of strategic alliances, can be an important instrument to stimulate those companies growth. In this context fit the technologic incubators and parks. This research, of qualitative character, investigates the growth of small software business that passed through an incubation process and presented a relevant growth. In this way, fifteen entrepreneurs from companies selected among the nine incubators awarded by ANPROTEC (Associação Nacional de Entidades Promotoras de Empreendimentos de Tecnologias Avançadas) had been submitted the interviews, through the year of 2008. The companies were selected based on its yearly revenue growth.The results suggest a direct influence of strategic alliance on the growth of most of the studied companies and also helps to understand in which way these alliances leveraged these companies growth.