There is a pressing need to transform existing food systems to address economic, social, environmental, and health-related issues. Dominant agri-food systems are based on long supply chains, which present certain advantages such as resource efficiency, economies of scale, mass production and lower prices. However, chains in this model are typically globalised, lead to the concentration of profit and involve high-tech processing. On the other end of the spectrum, short food value chains offer geographical proximity, a fairer price for farmers and the development of local economies. Nevertheless, volumes and distribution are often limited, convenience is low, and prices for consumers are generally higher. To address these shortcomings, the FAIRCHAIN project (www.fairchain-h2020.eu), will contribute to the development of intermediate food value chains, which combine elements from both short and long value chains, to achieve food systems that are more sustainable from an environmental, social, and economic perspective. The project strategy is focused on six case studies from the fruit, vegetable, and dairy sectors. These case studies cover the entire value chain, with a concentration on postharvest steps as power imbalances are primarily here: in the processing and retail sectors in conventional supply chains. The concept of intermediate-food supply chains will be publicised by the FAIRCHAIN project as will the technological, organisational, and social innovations put in place to get there.