⚙️ Castelion Builds Hypersonic Weapons to Reinvent U.S. Defense

⚙️ Castelion Builds Hypersonic Weapons to Reinvent U.S. Defense

Castelion, founded by ex‑SpaceX engineers, has raised $100M to mass‑produce affordable hypersonic missiles. The startup is targeting fast, scalable deterrence for the U.S. and its allies.

• Vertically integrates rocket motors, avionics, and heat shields
• Completed 3 hypersonic test flights in 30 days
• Focuses on agile, iterative development cycles

• Contracted by the Navy, Air Force, and Army
• Aims to counter threats from China, Russia, and North Korea
• Secured multiple SBIR awards and DoD partnerships

• Led by Lightspeed, with backing from a16z, Lavrock, Cantos & others
• Investing in full-scale production and flight demos
• Targeting operational readiness by 2027

Castelion’s fast-moving model could make hypersonic weapons cheaper, faster, and more deployable than ever before.

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