Armstrong also mentioned skepticism over plans to rely on private spaceflight companies for access to space.

The company contracts with the US military, NASA and private spaceflight companies.

Painter is one of the first customers to reserve a seat on Virgin Galactic, the sub-orbital spaceflight company owned by Sir Richard Branson.

Excalibur Almaz is a private spaceflight company which plans to provide a variety of deep space crewed exploration missions, micro-gravity science, and payload delivery.

Research institutions, principal investigators and private spaceflight companies would engage these individuals to conduct experiments in suborbital and eventually orbital space, as opposed to sending their own personnel on these missions.

Peter Madsen is an artist, submarine builder, aerospace engineer, entrepreneur and co-founder of Copenhagen Suborbitals; a private spaceflight company.

The space tourism industry (see List of private spaceflight companies) is being targeted by spaceports in numerous locations worldwide.

Scaled Composites, a private spaceflight company, was fined for unsafety following an explosion at the Mojave Spaceport.

The mission is organized by Space Adventures Ltd., a commercial spaceflight company.

Ashby was hired by Jeff Bezos's private spaceflight company Blue Origin as the Chief of Mission Assurance, where he works to assure safety for human space flight.