John Cioffi

Active Investor

Professor of Electrical Engineering at Stanford University

Redwood City, California

John Cioffi, Professor of Electrical Engineering at Stanford University is an active investor based in Redwood City, California. This profile covers what John Cioffi backs, at which stage, and how founders can reach out in 2026.

Investor type: AngelInvestment Partner
Stages: Pre SeedSeedSeries ASeries B
Invests in: Healthcare & BiotechBiotech & PharmaSaaS & EnterpriseConsumer & RetailClimate & EnergyIoT & Connected DevicesEdTechTelecom & Connectivity
Location: Redwood City, California
Typical check: $625K
Past investments: 15

Notable investments

PhyTunesMarvell SemiconductorClariPhy CommunicationsTeraneticsFiberify, Inc.PhyTunes IncTinoqAltoBeam Inc.Amati Communications CorpThe Marconi Society (non profit)Integrated Telecom ExpressASSIA, Inc.

How to reach John Cioffi

Angels and operators like John Cioffi 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 John Cioffi invest in?

John Cioffi invests in Healthcare & Biotech, Biotech & Pharma, SaaS & Enterprise and Consumer & Retail, typically at Pre Seed, Seed, Series A and Series B. Match your sector and stage, then reach out with a personalized pitch.