Superatom solids are promising for optoelectronic applications, owing to their tunable structural and electronic properties; yet, the electronic transport properties of these materials have been largely unexplored. Here, we report the Auger recombination dynamics of free carriers in two representative two-dimensional superatomic semiconductors, Re₆Se₈Cl₂ and Mo₆S₃Br₆, studied using ultrafast terahertz photoconductivity measurements. The fast Auger recombination dynamics are characterized by a cubic dependence of the Auger rate on carrier density in Re₆Se₈Cl₂ and a quadratic dependence in Mo₆S₃Br₆. The effective lifetimes of Mo₆S₃Br₆ (∼ 0.5 ps) are over an order of magnitude shorter than those (∼ 20 ps) of Re₆Se₈Cl₂. These results highlight the variability of the optoelectronic properties of different superatom solids.