William Jeffrey

Active Investor

Founder and General Partner at Airstream Venture Partners

San Francisco, California

William Jeffrey, Founder and General Partner at Airstream Venture Partners is an active investor based in San Francisco, California. This profile covers what William Jeffrey backs, at which stage, and how founders can reach out in 2026.

Investor type: VCPEInvestor
Stages: Seed
Invests in: SaaS & EnterpriseDeveloper Tools & DataIoT & Connected Devices
Location: San Francisco, California
Typical check: $250K
Past investments: 6

Notable investments

DiraqExecutive Office of the PresidentMRIGlobalSalience LabsTE ConnectivityNational Institute of Standards and Technology (NIST)

How to reach William Jeffrey

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Frequently Asked Questions

What does William Jeffrey invest in?

William Jeffrey invests in SaaS & Enterprise, Developer Tools & Data and IoT & Connected Devices, typically at Seed. Match your sector and stage, then reach out with a personalized pitch.