The SUD Fund

The SUD Fund is a Boston-based angel fund and syndicate backing tech-enabled startups focused on substance use disorder and addiction recovery. The category is one of the most underinvested corners of healthcare relative to its public health weight, and the fund’s narrow mandate reflects a deliberate choice to concentrate capital where generalist investors are largely absent. Investments sit at the intersection of digital health and mental and behavioral health, with attention to companies addressing detection, treatment access, recovery support, and care delivery for people with substance use disorders. Limited public information is available on a named investor team and portfolio composition in conventional venture-database form, consistent with an angel-and-syndicate operating model.

The fund participates at Pre-Seed and Seed stages with check sizes under $250k, sizing aligned with early angel and syndicate participation rather than lead institutional rounds. The Boston base places the fund near major academic addiction medicine programs and a strong digital health investor community. Geographic focus is United States-anchored, where the opioid epidemic, Medicaid coverage dynamics, and SAMHSA-funded treatment infrastructure define the operating environment for addiction-focused companies.

For founders, The SUD Fund is most useful as an early specialist check and a route to a syndicate of investors who understand the specific economics of addiction care. Founders should expect diligence shaped by operator and clinician fluency: who pays, which clinical settings adopt, and how outcomes are measured for a population often outside traditional healthcare engagement. The fund is the right fit for teams whose product genuinely addresses substance use disorder rather than treating addiction as a marketing angle on broader behavioral health offerings. Tangentially related digital wellness products are unlikely to fit.