November 05, 2009. Cary, North Carolina.. SAS, the largest private software company, makes a product called business intelligence or business optimization software, that looks for usable nuggets of information and insights in vast quantities of data. As the market for these types of products grows, SAS faces competition from some of the giants in the industry, such as Microsoft and IBM. The company differs from most in that it also provides many services for its employees, such as primary care doctors, daycare and a gym. . CEO and co-founder Dr. Jim Goodnight, among his collection of rocks and minerals from around the world.