Firestorm Labs, a defence tech company based in San Diego, has raised $82 million in a Series B round led by Washington Harbour Partners.
Additional investors include NEA, which led the $47 million Series A in July 2025, as well as Ondas, In-Q-Tel, Lockheed Martin Ventures, Booz Allen Ventures, Geodesic, Motley Fool Ventures, among others.
Dan Magy, Ian Muceus, and Chad McCoy co-founded Firestorm in 2022 to address the vulnerability of centralised factories to supply-line attacks. Their answer is to move manufacturing capabilities right to the front lines.
The xCell system puts HP Multi Jet Fusion 3D printers inside a 20-foot container that can be flown to forward bases. Firestorm’s Tempest drone, which weighs 55 pounds and has a 6-foot fuselage, can be 3D-printed in just 9 hours and fully assembled in 36 hours.
xCell also works as an open system, so partner companies can adapt their platforms for 3D printing and use xCell units in the field. This positions Firestorm as a provider of manufacturing infrastructure.
Other companies in defence additive manufacturing include SPEE3D’s EMU field printer, Craitor’s FieldFab, and larger drone platforms from Anduril and Kratos. Magy named General Atomics, Shield AI, and Kratos as the main San Diego competitors Firestorm wants to challenge.
What sets the xCell model apart is not its 3D printing technology, but how the system is put together. Its main strengths are rugged deployment, off-grid operation, ease of use for field operators, and an open design that allows military units to produce many different parts.
With this funding round, Firestorm has now raised a total of $153 million across seed, Series A, and Series B rounds. Over the past year, the company grew from 40 to more than 160 employees.
The new funds will help scale up xCell production, expand deployments, and support more hiring.
