According to Relativity Space is a private American aerospace manufacturer company headquartered in Los Angeles, California, “Relativity Space was founded on the idea that Blue Origin and SpaceX were not doing enough to use 3D printing as part of rocket manufacturing. Relativity plans to 3D print an entire launch vehicle they call Terran 1. The extensive use of 3D printing has allowed the company to iterate designs quickly, use less tooling and human labor. In March 2018, Relativity Space signed a 20-year lease at the John C. Stennis Space Center, a NASA rocket testing facility, to test engine components and eventually test full-scale Aeon 1 rocket engines.
The company says it will launch its first rocket named Terran 1 from the site in 2020. Relativity plans to start commercial launch service by early 2021.”