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Castelion logo — Modern Defense Production

Castelion

Modern Defense Production

Founded 2022 United States United States 132 employees Series C Total: $1.09B

General Information

Company Name Castelion
Founded Year 2022
Location United States United States +1
Employees 132
Funding Stage Series C
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Recorded by Bounce Watch from public sources. Every entry below carries the date we observed it, and when we have not looked recently the page says so rather than leaving silence to imply nothing happened.

Recently Funded Aug 21, 2026

Raised 1B in Series C round.

In The News Aug 21, 2026

Featured on Webrazzi: Castelion, 13 milyar dolar değerleme üzerinden 1 milyar dolar yatırım aldı

In The News Aug 21, 2026

Featured on Thenextweb: Castelion raises $1bn at $13bn to scale hypersonic weapon production

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About Castelion

Castelion, established in 2022, is at the forefront of modern defense technology. Operating under the slogan "Modern Defense Production," the company is actively redefining the landscape of hypersonic strike weaponry.

Headquartered in the United States, Castelion's mission is encapsulated by its dedication to "forging the future of hypersonic strike weapons." This strategic focus places it in a niche segment of the defense industry, where innovation and precision are paramount.

The startup's notable progress caught investor attention, leading to an Early VC investment executed on 01 December 2025. Although specific investor details remain undisclosed, this funding signals strong confidence in Castelion's potential to significantly impact defense capabilities.

For investors keen on leveraging emerging technologies within the defense sector, Castelion represents a compelling opportunity with its vision and innovative trajectory.

Taxonomy: Hypersonic Strike Weapons, Defense Technology, Hardware Development, Manufacturing Processes, National Security Challenges, Affordability in Defense, Supply Chain Robustness, Aerospace Defense, Industrial Automation, Military Solutions, Venture-backed Startups, Defense Innovation, Scale in Manufacturing, Government Contracts

Services & Products

Development and Manufacturing of Hypersonic Weapons
Systems Integration for Military Platforms
Rapid Test and Iteration of Military Hardware
Compliance and Cybersecurity Solutions

Target Customers

U.S. Department of Defense U.S. Army U.S. Navy Defense Contractors and Partners

Funding Rounds & Investors (5)

View All
Funding Stage Amount Investors Lead Investors Date
Series C •••••• 9
Investor Investor Investor Investor Investor
•••• •••• 		21 Aug 2026
Early VC •••••• - 01 Dec 2025
Debt Financing •••••• 8
Investor Investor Investor Investor
•••• •••• 		01 Jan 2025
Grant •••••• 5
Investor Investor Investor
•••• •••• 		01 Oct 2023
Early VC •••••• - 01 Apr 2023

Latest News

View All
Castelion raises $1bn at $13bn to scale hypersonic weapon production — Thenextweb
Castelion raises $1bn at $13bn to scale hypersonic weapon production
Thenextweb Aug 21, 2026
Castelion, 13 milyar dolar değerleme üzerinden 1 milyar dolar yatırım aldı — Webrazzi
Castelion, 13 milyar dolar değerleme üzerinden 1 milyar dolar yatırım aldı
Webrazzi Aug 21, 2026

Castelion Alternatives & Competitors

View All Alternatives
Castelion vs
Xavier Defense, LLC
Xavier Defense, LLC United States

Advancing American Primacy

5 employees
Government and Military, Industrial
Castelion vs
Shamong Manufacturing
Shamong Manufacturing United States

Fabricating precision sheet metal components for defense, medical, electronics and instrumentation m...

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Compare Castelion vs Shamong Manufacturing
Castelion vs
SWEBAL
SWEBAL Sweden

Explosives for Defense and Security. Trinitrotoluene (TNT). Sourced and Produced in Sweden

Corporate
3 employees
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FAQ About Castelion

Modern Defense Production
Castelion was founded in 2022.
Castelion is headquartered in United States.
Castelion has approximately 132 employees.
Castelion has completed 5 funding rounds, raising a total of $1.09B. The latest funding stage is Series C.
Castelion offers: Development and Manufacturing of Hypersonic Weapons, Systems Integration for Military Platforms, Rapid Test and Iteration of Military Hardware, Compliance and Cybersecurity Solutions.
Top alternatives and competitors to Castelion include Xavier Defense, LLC, Shamong Manufacturing, SWEBAL, Serichai Military Co., Ltd., Falk Defence. These companies operate in related industries and serve comparable markets. You can compare them side by side on Bounce Watch.
Castelion and Xavier Defense, LLC are both companies in similar industries. Compare their funding, team size, growth signals, and market position on Bounce Watch to see which one fits your needs.

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