The principal strength of the UPEC comes from the network of entities that form a part of the project and that give him support. From the beginning of the project the associative base of the UPEC has grown, enriching the content and contributing different looks on the reality.

This support demonstrates across the incorporation of the organizations to the Social Council of the UPEC. The entities interested in joining have to accept the beginning established in the Bylaws and in the Manifest Fundacional of the Progressive Summer university of Catalonia.