Castellion
Peace Through Deterrence
- Headquarters
- Scottsdale, Arizona
- Employees
- 51–200
- Founded
- 2022
- Business Model
- B2G
- Website
- castellion.ai
- Total Funding
- $420.0M
- Last Round
- $350.0M Series BDec 2025
About
Castelion is a defense tech startup building affordable hypersonic strike weapons designed for mass production. Founded by ex-SpaceX engineers, it focuses on speed, cost control, and rapid deployment to restore U.S. deterrence. Recently closed $350M Series B and secured Navy contracts for Blackbeard system.
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