The superconducting ratchet effect, where a net motion of vortices in one direction is observed in the presence of an AC driving force, is an effect observed in the presence of an array of asymmetric pinning sites. The spontaneous appearance of such an effect in a disordered system is feasible when the disorder is inhomogeneous with a characteristic length scale of the order of the system's size. We demonstrate such a case experimentally in Indium Oxide (InO) nanowires in the vicinity of the superconductor-insulator transition (SIT). Our results further strengthen previous experiments that show an internal inhomogeneity of InO, and may be used to brobe the existence of superconductivity in the insulating side of the SIT.