  We perform a systematic analysis of models with GeV-scale dark matter coupled
to baryons and leptons. Such theories provide a natural framework to explain
the matter-antimatter asymmetry of the universe. We find that only a few
baryonic dark matter models are free from tree-level proton decay without
explicitly imposing baryon number conservation. We enumerate those cases and
provide a brief overview of their phenomenology. We then focus on a leptonic
dark matter model for a more detailed discussion of the baryon asymmetry
generation via leptogenesis, the symmetry restoration in the dark sector and
the expected dark matter annihilation signals in indirect detection
experiments.
