GreyMatter is a venture fund focused specifically on mental, behavioral, and brain health, founded by Andrew Barr, who has spoken about his own experience with OCD, and Danish Munir, who previously built the telepsychiatry company Genoa/1DocWay, and the fund backs founders with research and technology guidance, a mental-health-specific advisor group including policy and payer experts, and a talent program called Mental Health Build that connects students, engineers, and MBAs to the field. Its portfolio spans crisis care, serious mental illness, autism services, addiction, trauma, maternal mental health, youth care, and neuromodulation hardware, with a stated focus on populations tied to high emergency, inpatient, and criminal-justice costs, and its public materials describe mental health as an infrastructure problem requiring coordination across research, payors, providers, and policy.