Open innovation incorporates external knowledge and ideas into a company's innovation process, while closed innovation develops innovations entirely within the company. With open innovation, the innovation process occurs both inside and outside the company through collaboration. Closed innovation keeps the innovation process strictly internal. While closed innovation was traditionally preferred, open innovation is growing in importance due to increased mobility and availability of qualified specialists, venture capital, and external sources of knowledge. However, some companies still favor closed innovation, especially for complex, unique, or highly competitive innovations.