Dream Chaser is an American reusable lifting-body spaceplane developed by Sierra Space. Originally intended as a crewed vehicle, the Dream Chaser Space System is set to be produced after the Dream Chaser Cargo System cargo variant is operational. The crewed variant is planned to carry up to seven people and cargo to and from low Earth orbit.

Sierra Space Corporation, commonly referred to as Sierra Space, is a privately held aerospace and space technologies company headquartered in Louisville, Colorado, with additional facilities in Colorado, Wisconsin, Florida, North Carolina and a testing site at the Marshal Space Flight Center in Alabama. The company makes spaceflight hardware for various applications across the industry. It is currently developing the Dream Chaser spaceplane. The spaceplane was selected by NASA to provide services to the International Space Station under NASA's Commercial Resupply Service 2 contract. The company is also in collaboration with Blue Origin to develop components of the Orbital Reef space station.