CO-LaN membership is organized in two categories: one gathers the industrial users of CAPE software which are Full Members of the CO-LaN. A second category gathers the providers of CAPE software, academic institutions, public and federal agencies, carrying out research activities in the field of CAPE, and other interested parties. In this second category, members are Associate Members.

Till 2020 included, Full Members pay annual dues, while Associate Members do not pay any dues. Starting January 1, 2021, some Associate Members will also contribute to CO-LaN revenues.