  We study the prospects of probing neutrino mass models at the newly proposed
antimuon collider $\mu$TRISTAN, involving $\mu^+e^-$ scattering at $\sqrt{s}=
346$ GeV and $\mu^+\mu^+$ scattering at $\sqrt{s}= 2$ TeV. We show that
$\mu$TRISTAN is uniquely sensitive to leptophilic neutral and doubly-charged
scalars naturally occurring in various neutrino mass models, such as Zee,
Zee-Babu, cocktail, and type-II seesaw models, over a wide range of mass and
coupling values, well beyond the current experimental constraints. It also
allows for the possibility to correlate the collider signals with neutrino
mixing parameters and charged lepton flavor violating observables.
