  Atomic interference experiments test the universality of the coupling between
matter-energy and gravity at different spacetime points, thus being in
principle able to probe possible violations of the universality of the
gravitational redshift (UGR). In this contribution, we introduce a UGR
violation model and then discuss UGR tests performed by atomic clocks and atom
interferometers on the same footing. We present a large class of
atom-interferometric geometries which are sensitive to violations of UGR.
