Synergies between Horizon Europe and European regional funding offer considerable potential for the development of technological solutions to enable the green transition in Europe. The workshop demonstrates that synergies between funding programmes can foster the creation of value chains from research to application in hydrogen technologies. By showcasing the combination of different financial resources offered by regions, member states and the European Union in regional and European funding projects, the challenges of exploiting strategic synergies are addressed. The workshop highlights examples of regional experiences in the development of hydrogen as a green energy technology and its application in the area of sustainable transport, with the aim of stimulating interregional policy initiatives for investment in green innovations.