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Castelion

Defence · Torrance, United States · Founded 2022 Unicorn

Castelion is a forward-thinking startup focused on enhancing global stability through advanced military technology. The company designs, tests, and manufactures next-generation military systems at a rapid pace and on a large scale. Their mission is to maintain a global technical edge for America and its allies, ensuring peace through deterrence. Castelion's primary offerings include ultra-high-performance thermal protection systems and avionics, which are essential components of modern military vehicles and aircraft. These systems help protect and enhance the performance of military equipment, making them more effective in various operational scenarios. The company primarily serves government clients, including the U.S. Department of Defense and allied nations' defense agencies. By providing cutting-edge technology, Castelion helps these clients maintain a strategic advantage in global defense. Operating in the defense technology market, Castelion's business model revolves around research and development, followed by large-scale manufacturing. They invest heavily in innovation to stay ahead of potential threats and ensure their products meet the highest standards of performance and reliability. Castelion makes money through government contracts and partnerships with defense agencies. These contracts often involve long-term agreements, providing a steady revenue stream. Additionally, the company may engage in collaborative projects with other defense contractors, further expanding its market reach and financial stability. In summary, Castelion is a key player in the defense technology sector, dedicated to developing advanced military systems that support global stability and peace through deterrence. Keywords: military technology, defense systems, thermal protection, avionics, rapid manufacturing, government contracts, defense market, innovation, global stability, deterrence.

Valuation
$1–2.5B
Latest valuation · 2025
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Headcount
100–500
Current team size
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Total funding Pre-IPO
$100–500M
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Investors

16 investors on Castelion's cap table

Sourced from Dealroom's funding history. Investor profile links are shown where available.

Seed 2 investors entered at this stage
Series A 13 investors entered at this stage
Andreessen Horowitz
Lavrock Ventures
First In Capital
BlueYard Capital
Champion Hill Ventures
Lightspeed Venture Partners
Interpagos
Cantos Ventures
Interlagos Capital
Altimeter Capital
General Catalyst
Space VC
Avenir
Series B+ 1 investor entered at this stage

Global footprint

Where Castelion has talent and traffic

Workforce by country
🇺🇸 United States · Torrance HQ
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Talent graph

The shape of Castelion's talent

Dealroom maps Castelion's team person by person — pinpointing the standout operators and scoring them across the six dimensions investors underwrite. The counts and shape below are a public preview; the named individuals and exact scores live in the platform.

10 team members profilednamed & role-tagged by Dealroom
174 employeestotal headcount
3 executives & foundersidentified by name
DimensionScore
AI Talent Score hidden — book a demo
Engineering Score hidden — book a demo
Product Score hidden — book a demo
Go-to-market Score hidden — book a demo
Leadership Score hidden — book a demo
Research Score hidden — book a demo
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Source: Dealroom Talent Intelligence. Public profiles show counts and the team's shape only — request a demo for the named individuals, per-person seniority and tenure, and team benchmarks vs peers.

Market sentiment

What the market is saying about Castelion

An AI-synthesized read of the highest-engagement posts about Castelion on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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