The study explores the models of sharing economy in open innovation environment that are implemented by companies. On the base of the survey of top managers of innovation companies from North-West of Russia, we identified four key sharing models: The sharing of laboratories and equipment, the sharing of highly qualified engineering teams and individual professionals, and the sharing of research and development based on open innovation systems. These models can be both independent and convergent. Over time, given the potential for digital platforms to advance innovation, sharing models could occupy the research and development niche and gradually displace traditional forms of innovation organization. To understand costs and benefits of using innovative resources sharing, we conducted the model analysis and received the indicator that characterizes the relative level of companies' losses related to innovative resources disintegration. Using the case of low temperature technologies project, we calculated the efficiency of using sharing innovative resources.