The solutions shared with Social and Solidarity Economy actors and jointly developed represent the long-term commitment of public and private bodies (and, for some solutions, the 4–5-helix ecosystem) to strengthen their collaboration for a more place-based, inclusive and sustainable economic development. The solutions highlight key elements that enable long-lasting effects, particularly through shared governance mechanisms, innovative tools, capacity building and increased visibility. They demonstrate that place-based, bottom-up approaches and co-creation can generate both effective and efficient impact. The solutions were designed to tackle the following needs: the need to innovate tools and intervention methodologies within the Solidarity Economy system to improve dialogue and collaboration among public and private actors, the need to strengthen skills, knowledge sharing and competencies for social economy organisations, the need to deepen cooperation and improve monitoring processes, the need to connect SSEs with intermediaries and policymakers, facilitating resource-sharing and mutual support and the need to involve local government in the development of the social economy and to improve cooperation with social economy entities.