Castelion is a defense tech company that applies modern hardware development and manufacturing processes to national security challenges.
Castelion has raised $350.0M in total funding. The most recent round was Series B. The last funding was announced in December 2025.
Castelion's investors include Andreessen Horowitz, General Catalyst, Lightspeed Venture Partners, Valor Equity Partners, Cantos.
Castelion is headquartered in Torrance, United States.
Castelion is a defense tech company that applies modern hardware development and manufacturing processes to national security challenges.
Castelion is at the Series B stage.
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"Castelion — Funding & Investors." VCBacked, December 5, 2025, https://www.vcbacked.co/company/castelion. Accessed July 27, 2026.
VCBacked. (2025). Castelion — Funding & Investors. Retrieved July 27, 2026, from https://www.vcbacked.co/company/castelion
{{cite web |title=Castelion — Funding & Investors |url=https://www.vcbacked.co/company/castelion |website=VCBacked |access-date=July 27, 2026}}Profile data sourced and verified per the VCbacked methodology · Last funding round dated