| Phase Four | Revolution Space | |
|---|---|---|
| Founded | 2015 | 2014 |
| Headquarters | Hawthorne, California | Charlestown, Massachusetts |
| Type | private | private |
| Status | closed | operating |
| Employees | 5 | 38 |
| Total funding | $35.8M | $100.8M |
| Latest round | Series C | Venture |
| Sectors | Space Propulsion, Satellite Components & Subsystems | Space Propulsion, Satellite Components & Subsystems |
| Products listed | 4 | 1 |
| Federal contracts | — | — |
| Launches | — | — |
| Leaders listed | Steve Kiser, M. Umair Siddiqui, Simon Halpern | Darren Garber, PhD, Darren Womacks, Paul Richards |
| News mentions | 0 | 2 |
How do Phase Four and Revolution Space compare?
Both companies work in Space Propulsion, Satellite Components & Subsystems. Phase Four was founded in 2015 and Revolution Space in 2014.
Which is larger, Phase Four or Revolution Space?
Revolution Space reports the larger workforce, with 38 employees versus 5.