Sean Flannagan

Active Investor

Principal & Founder at Hearth

Boston, Massachusetts

Sean Flannagan, Principal & Founder at Hearth is an active investor based in Boston, Massachusetts. This profile covers what Sean Flannagan backs, at which stage, and how founders can reach out in 2026.

Investor type: Angel
Stages: Pre SeedSeed
Invests in: Healthcare & BiotechSaaS & EnterpriseConsumer & RetailE-commerce & D2CMarketplace
Location: Boston, Massachusetts
Typical check: $150K
Past investments: 1

Notable investments

92nd Street Y

How to reach Sean Flannagan

Angels and operators like Sean Flannagan reply to specific, personalized notes that show real traction, not mass blasts. Build a verified list, write a note that fits their thesis, and track replies, all on Round Funded.

Frequently Asked Questions

What does Sean Flannagan invest in?

Sean Flannagan invests in Healthcare & Biotech, SaaS & Enterprise, Consumer & Retail and E-commerce & D2C, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.