APPEC is a consortium of 19 funding agencies, national government institutions, and institutes from 17 European countries, responsible for coordinating and funding national research efforts in astroparticle physics.

The APPEC General Assembly gathers heads of agencies around Europe and observers from international organizations such as CERN, the European Southern Observatory (ESO), Astronet and the European Committee for Future Accelerators (ECFA), to coordinate a collective European strategy for astroparticle physics, execute the recommendations of the roadmap and to create a forum where future actions are discussed and common endeavours emerge.