Hermeus develops hypersonic unmanned aircraft and pursues rapid prototyping and flight testing to accelerate aircraft maturation. The company has flown multiple demonstrators, including a recent demonstrator about the size of an F-16 and an earlier, smaller demonstrator, and is working on a third aircraft iteration aimed at supersonic performance. Hermeus shifted from developing an in-house engine to modifying Pratt & Whitney’s F100 engine via a relationship with RTX/Pratt & Whitney to speed testing and reduce technical risk. The startup is expanding manufacturing capabilities and hiring—its staff is approaching roughly 300 employees—to support hardware production and iterative builds. Financially, the company recently raised $200 million in equity and $150 million in debt, valuing it at $1 billion, to fund growth and continued flight-test programs.

Total raised

$466M

Funding rounds

5

Latest round

Debt Financing

Latest activity

Apr 2026