Poseidon Aerospace

Poseidon Aerospace is a San Francisco startup building unmanned cargo aircraft designed to move heavy loads to places without runways. Founded in 2024 by ex-Amazon engineer David Zagaynov and ex-Lockheed Martin engineer Parker Tenney, the company is developing two purpose-built autonomous platforms - Egret, a short takeoff and landing aircraft, and Heron, an amphibious seaplane - each engineered to carry up to two tons roughly 1,500 miles. Backed by an $11M seed round led by Tamarack Global, Poseidon aims to slash the cost-per-ton-mile of air logistics for both commercial feeder routes and contested military supply missions, with first full-scale flight tests targeted for mid-2026.