Castelion's $13 Billion Mission to Close the U.S. Hypersonic Missile Gap
Former SpaceX executives aim to disrupt defense giants with low-cost, scalable hypersonic technology.
1The Hypersonic Performance Gap
Hypersonic missiles travel at Mach 5 or faster, moving too quickly for traditional radar to track effectively. Unlike ballistic weapons, they are highly maneuverable and can change course mid-flight. While Russia and China have already fielded these systems, the United States has struggled to move beyond the research and testing phase.
2Startup Origins and Ambition
Founded in 2022 by former SpaceX executives Bryon Hargis, Andrew Kreitz, and Sean Pitt, Castelion aims to disrupt the defense industry. The company initially faced skepticism from the Pentagon, but has since secured a program of record status. Their goal is to manufacture missiles faster and cheaper than traditional defense prime contractors.
3The Blackbeard Missile Program
Castelion’s flagship product, the Blackbeard missile, is designed to cost less than $500,000 per unit. This represents a significant price reduction compared to existing alternatives like the Tomahawk. The U.S. Navy awarded the company a contract worth up to $200 million to accelerate the development and deployment of this specific weapon system.
4Iterative Development Philosophy
The founders argue that the U.S. defense sector lost its edge by abandoning the iterative testing approach used during the Apollo era. By building, flying, and testing hardware in rapid cycles, Castelion seeks to replicate that historical speed. They emphasize that this methodology is essential for keeping pace with modern global competitors.
5Scaling Production in New Mexico
Castelion is currently establishing a 1,000-acre facility in Rio Rancho, New Mexico, to serve as its primary production hub. The site is expected to eventually produce thousands of missiles annually. Senior leadership, including the three co-founders, plans to be physically present at the site to ensure safety and operational efficiency.
6Competitive Pressure on Primes
Castelion’s emergence forces established defense giants like Lockheed Martin to adapt their pricing and production timelines. Lockheed’s Dark Eagle program has faced delays, reportedly falling three years behind schedule. By offering a viable, lower-cost alternative, Castelion creates a competitive environment that incentivizes the entire defense industrial base to improve performance.
7Financial and Operational Growth
The company has grown from 159 employees at the end of 2025 to over 400 staff members today. After initial funding challenges, including a $5.6 million seed round led by Lavrock, they secured significant backing from Andreessen Horowitz. They currently hold over $500 million in total U.S. government contracts for their defense projects.
8Deterrence as a Strategic Goal
Leadership views their technology as a critical tool for peace through deterrence. They argue that providing the U.S. with a credible hypersonic capability creates a necessary middle ground between economic sanctions and nuclear conflict. The founders believe this capability will define the nature of warfare in the 2030s and beyond.
9Navigating Defense Bureaucracy
Successfully selling to the Department of Defense requires navigating complex acquisition cycles and classified information protocols. Castelion’s strategy involved proving their capabilities with a small $3 million initial contract, which eventually led to larger commitments. This step-by-step validation was crucial for gaining the trust of the Pentagon’s innovation divisions.
10The Urgency of Modern Warfare
The current geopolitical climate demands a rapid response to potential long-range fire conflicts. Castelion operates with the mindset that they are in a sprint to prepare for future threats. By prioritizing speed and cost-efficiency, the company aims to ensure the U.S. remains ready for the realities of 21st-century military engagement.
Original article: Fortune — Castelion's $13 Billion Mission to Close the U.S. Hypersonic Missile Gap