Spaceium Inc.

Spaceium is a Y Combinator (S24) aerospace startup building unmanned refueling and servicing stations in orbit - what its founders call service stations along a 'space superhighway.' Its proprietary cryogenic storage system holds multiple metric tons of fuel for up to a decade in orbit without boil-off, and its high-precision robotic arm transfers propellant and performs repairs. The goal is to let spacecraft top up in space instead of carrying all their fuel from launch, extending missions and lowering costs for satellites, orbital transfer vehicles, and eventual Moon and Mars missions.