Radian Aerospace

Radian Aerospace, founded in 2016 and headquartered in Renton, Washington, is developing a fully reusable single-stage-to-orbit spaceplane that takes off from a sled-assisted runway, reaches orbit, delivers payloads, and returns to land on a conventional runway. The company's approach eliminates the need for expendable propellant systems and complex launch infrastructure, potentially enabling rapid turnaround (days rather than weeks) and significantly reduced cost per kg to orbit. Radian has raised significant venture funding and has extensive aerospace talent from Boeing and other major primes.