Co-production is a term that has been used to describe arrangements where receivers of services are also involved in producing them. This type of arrangements can be found in a wide range of services and situations, which has stretched the concept of co-production to a point where its meaning is becoming less clear. This paper presents research on co-production from two very different service areas that will show both commonalities and differences in the interpretation of the concept. What is at the core of the concept and how can co-production be transferred from one service area to another? These are questions addressed in this paper, using existing research on childcare and addiction treatment and in Sweden.