ComPACT cluster candidates cross-matched with ACT DR5 (1027 objects; blue dots in the upper left panel) and PSZ2z (399 objects; orange dots in the upper right panel). On the bottom panel we present clusters from ACT DR5 (green stars) and PSZ2z (purple stars) that have SZcat candidates within a 5-arcmin radius, but are not presented in ComPACT. Blue contours show density of SZ sources in ACT DR5 on the mass–redshift plane, while orange contours represent density of PSZ2z sources. From comparing ComPACT candidates matched with ACT DR5 and density contours of ACT DR5 sources, it appears that we miss low-mass clusters especially at intermediate and high redshifts. It might be due to our cluster detection criteria and because ComPACT is based on SZcat, which in turn is constructed from Planck maps.