Defense
Missiles, interceptors, autonomy and security for the US and its allies. 8 companies, $1.99B in disclosed funding.
| SpaceX alumni founders | |||||
|---|---|---|---|---|---|
| Castelion Low-cost hypersonic weapons built at production scale. | Defense | Bryon Hargis, Sean Pitt, Andrew Kreitz | 2022 | California | $1.45B |
| Long Wall Missile defense interceptors and hypersonic test vehicles. | Defense | Harry O'Hanley, Dan Piemont | 2017 | Long Beach, CA | $500M |
| Andrenam AI-powered underwater sensing buoys for maritime security. | Defense | Matej Cernosek | 2024 | California | $28M |
| Fortastra Maneuverable satellites for orbital defense. | Defense | Mike Smayda | 2025 | California | $8M |
| Wraithwatch AI that defends against AI-generated cyberattacks. | Defense | Nik Seetharaman | 2023 | Los Angeles, CA | $8M |
| Galadyne Liquid-fueled missiles designed for mass production. | Defense | Chandler Luzsicza | — | Austin, TX | — |
| Gambit Software that lets fleets of unmanned systems team up and adapt. | Defense | Josh Giegel | — | Not disclosed | — |
| Hop Aero Autonomous rockets that deliver cargo anywhere in minutes. | Defense | Jacob Balaj | 2025 | Los Angeles, CA | — |