Justin Rosenstein

Active Investor

Co-founder & President at One Project

California

Justin Rosenstein, Co-founder & President at One Project is an active investor based in California. This profile covers what Justin Rosenstein backs, at which stage, and how founders can reach out in 2026.

Investor type: AngelInvestor
Stages: Pre SeedSeed
Invests in: Artificial IntelligenceFintechHealthcare & BiotechBiotech & PharmaSaaS & EnterpriseIoT & Connected DevicesGaming & EntertainmentMedia & Content
Location: California
Typical check: $150K
Past investments: 3

Notable investments

VibelySustainCabin

How to reach Justin Rosenstein

Angels and operators like Justin Rosenstein 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 Justin Rosenstein invest in?

Justin Rosenstein invests in Artificial Intelligence, Fintech, Healthcare & Biotech and Biotech & Pharma, typically at Pre Seed and Seed. Match your sector and stage, then reach out with a personalized pitch.