OMass Therapeutics is a private biotechnology company, focused on structural mass spectrometry to discover novel medicines.

The company uses its suite of proprietary technologies based on high-resolution mass spectrometry to study intact protein assemblies. The technology enables detection of drug leads that not only bind to the target complex, but also exert a functional effect through modulation of complex formation, with both effects, binding and function, being measured by a change in mass. These methods are being applied to drug discovery for a variety of complex targets, including membrane receptors.