This aid promotes cooperation between research organizations and companies for the joint realization of R+D+i projects. RETOS finances up to 95% in the form of a loan to participating companies and in the form of a grant or reimbursable advance to universities or public research centers. In this sense, the CHALLENGES-COLLABORATION call aims to stimulate, through project funding, the generation of a denser mass dedicated to R+D+I to advance in the search for solutions in accordance with the priorities established in the Challenges, helping in turn to promote the creation of innovative companies and the orientation of the activity of existing companies towards innovative activity. On the other hand, it also seeks to mobilize private investment, generate employment and improve the country's technological balance, as well as to strengthen Spain's international leadership capacity as a country of Science, Technology and Innovation.