Hop Aero Secures $11M to Accelerate Suborbital Logistics
Logistics startup Hop Aero raises $11 million in SAFE funding to develop Rook, an autonomous suborbital rocket designed for rapid point-to-point delivery and contested environment drone deployment.
Tactical Insertion: The $11M Seed
Suborbital logistics firm Hop Aero has secured $11 million in new funding following its residency in the Y Combinator summer batch. According to Payload, the capital was raised via Simple Agreements for Future Equity (SAFEs), led by Initialized Capital. CEO Matija Milenovic confirmed the round was oversubscribed, positioning the seven-person team for a future Series A.
The Hardware: Rook Prototypes
Hop Aero is developing Rook, an autonomous rocket designed to transport cargo across hundreds of miles in minutes. During recent field operations at the Infinity One Oklahoma Spaceport, the team executed critical systems validation despite a compressed schedule forced by local drought conditions and looming fire bans.
Key technical milestones achieved include:
Propulsion: 3D-metal-printed engines developed via proprietary hopOS software underwent successful hot-fire testing.
Integration: A half-scale Rook prototype completed a full static fire, validating fuel tanks, plumbing, and harnesses.
* Deployment: A rail-based mechanism successfully deployed four autonomous drones from the payload bay—a direct demonstration of the platform's utility for defense customers operating in contested zones.
The Trajectory: 2027 and Beyond
While the static fires de-risked propulsion, the primary hurdle remains: achieving stable, intact landings after hypersonic reentry. The new capital will fund the transition to Rook 2, a full-scale iteration of the vehicle. Hop Aero expects to move from tethered static tests to an initial untethered flight by mid-2027. Infrastructure expansion at the Oklahoma site is already underway, with concrete for larger launch pads scheduled for placement by year-end.