Social and economic disparities remain evident in central Europe and negatively influence cohesion. Social exclusion and poverty also affect some regions more than others and this needs to change. To do so, the 3P4SSE project goes beyond state-of-the-art social innovation projects. The partners adopt a place-based clustering approach when addressing specific challenges of social and solidarity economies. Amongst others, they create a multilevel network scheme based on public-private partnership models and establish strategic cooperation among stakeholders.