Peace Through Deterrence
Castelion designs and manufactures affordable hypersonic strike weapons for the US military, combining rapid iteration, vertical integration, and scalable manufacturing inspired by the WWII and Apollo engineering eras. Founded by former SpaceX executives, the company focuses on restoring America's conventional deterrence capabilities through credible, non-nuclear long-range strike systems. The company raised $350M in a December 2025 Series B and secured a $49.9M Navy contract in early 2026.
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