Castelion

Castelion is a defense company that designs, tests and manufactures military systems. Its stated goal is to build hardware quickly and at large scale to deter future wars. The site names Blackbeard as its first product, a low-cost hypersonic strike missile. The company has offices in Torrance, California and Allen, Texas.

The site says the company builds low-cost hypersonic weapons. It says Blackbeard is designed to be made in large numbers. Castelion also plans to expand its range to longer-range strike weapons and defensive systems. The site says the company brings core technologies in-house to move faster and control cost. It also has a Project Ranger page.

The company has announced several U.S. Navy orders. In June 2026 the Navy ordered 50 early operational capability prototypes and 50 storage and shipping containers, worth $23.4 million. In August 2026 the Navy awarded an order of about $90 million to advance Blackbeard to early operational capability. In September 2026 the company announced a production order valued at up to $200 million.

On August 19, 2026, the company announced a $1 billion Series C fundraise. The money is meant to scale production of Blackbeard. The site also has a company timeline. In 2023 Castelion was selected for an Air Force Research Laboratory program, and it fired its first solid rocket motor in the Mojave Desert. In 2024 it flew its first hypersonic test vehicle.

The careers section lists open engineering roles in Torrance and Allen. The site warns candidates about recruitment scams. It says official communication comes only from the company's own domain. The company also says it wants people who want to work on real hardware.

The contact page includes a supplier inquiry link and a media kit. Media questions go to a dedicated media address listed on the site. The contact form uses a reCAPTCHA check.