Blue Origin
- http://www.blueorigin.com/
- Aerospace research and development company working on spacecraft and launch systems with the ultimate goal of contributing to an enduring human presence in space.
EarthColony1
- http://www.earthcolony1.org
- Nonprofit plan to establish the first near-earth space colony to preserve human culture and forward human expansion into space.
Lifeboat Foundation
- http://lifeboat.com/
- Arguments why life on Earth may become extinct in the coming century, and a plan to save humanity through colonies in space.
LiftPort - The Space Elevator Company
- http://www.liftport.com/
- Company devoted to building a vital and highly profitable infrastructure for off-world industry. The Space Elevator is a key enabling technology for any work done off the planet, whether in near-earth orbit, at geosynchronous distances, or far beyond the moon.
The L5 Development Group
- http://l5development.com/
- A privately funded, for profit, space exploration and development program whose initial business plan is to build space colonies at L5 and manufacture solar power satellites to meet the Earth's energy needs
