The Innovative Common Laboratory For Space Spectroscopy (LabCom INCLASS) combines the expertises of IAS, a laboratory of the National Center of Scientific Research (CNRS) and of the University of Paris-Saclay, and ACRI-ST (https://www.acri-st.fr/fr/), an independent SME based in Sophia-Antipolis, in order to develop new methodologies for spectral-imaging data fusion applied to the James Webb Space Telescope (JWST), and the Copernicus (EC) Sentinel-2 and -3 missions. The LabCom was created on 1 May 2021, for an initial period of four years.