Castelion vs X-Bow Systems
Side-by-side comparison of AI visibility scores, market position, and capabilities
Raised $350M Series B (Dec 2025). $50M US Navy contract for Blackbeard hypersonic prototyping. 1,000-acre solid rocket motor facility under construction.
About
Castelion is a defense startup developing the Blackbeard hypersonic missile system, one of the few startups with an active US Navy contract for hypersonic weapons full-scale prototyping and early operational fielding. The company raised $350 million in Series B financing in December 2025 and secured a $50 million US Navy contract for Blackbeard prototyping, directly addressing the DoD's urgency to field hypersonic strike capability as China and Russia have demonstrated operational hypersonic weapons.
Founded 2016, Albuquerque NM. $105M Series B led by Lockheed Martin (2025). DoD contracts: $64M hypersonic SRMs, $67M Navy, $191M advanced SRM. Valued ~$591M on Forge.
About
X-Bow Systems is a next-generation defense propulsion company headquartered in Albuquerque, New Mexico, founded in 2016 by CEO Jason Hundley. The company specializes in the design, development, and production of solid rocket motors (SRMs) for national security, hypersonic weapons, and space applications. Its proprietary Additive Manufacturing of Solid Propellant (AMSP) technology — the core of its 'Rocket Factory in a Box' platform — replaces the traditional cast-and-pour method with a precision extrusion process that builds propellant grain geometry layer by layer, enabling faster development cycles, lower costs, and scalable production without sacrificing safety or reliability.
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