Corporate accelerators are a rapidly growing entrepreneurial phenomenon occurring in different business contexts and business models within corporate entrepreneurship. Corporate accelerators are considered as an innovation fostering approach within new ventures provided by start-ups. The aim of the paper is twofold: firstly, to explore the motives behind corporations' engagement with start-ups in launching corporate accelerators, and secondly, to identify the corporate benefits and challenges of this business model innovation. The research design is based on a qualitative interpretative approach exploiting a triangulation of methods by using in-depth interviews (IDI) with corporate managers involved in development of corporate accelerators as well as a focus group interview (FGI) with industry experts. In addition, secondary data were applied to strengthen the exploratory research. The study demonstrates that a wide range of benefits stem from the accelerator activities which can ultimately can initiate changes in large companies. Our research expands on prior findings and suggests that corporate accelerators are driven by internal and external push and pull motives. The study contributes to expanding the scope of corporate entrepreneurship research in regard to the challenges and benefits of corporate accelerators. It provides evidence that corporate accelerators are a source of innovation that can be used to foster entrepreneurial-market logic and entrepreneurial learning.