| Phase Four | Relativity Space | |
|---|---|---|
| Founded | 2015 | 2015 |
| Headquarters | Hawthorne, California | Long Beach, California |
| Type | private | private |
| Status | closed | operating |
| Employees | 5 | 1,285 |
| Total funding | $35.8M | $1.4B |
| Latest round | Series C | Series F |
| Sectors | Space Propulsion, Satellite Components & Subsystems | Launch Services, Space Propulsion |
| Products listed | 4 | 4 |
| Federal contracts | — | — |
| Launches | — | 3 (0%) |
| Leaders listed | Steve Kiser, M. Umair Siddiqui, Simon Halpern | Eric Schmidt, Maria Seferian, Kevin Wu |
| News mentions | 0 | 0 |
How do Phase Four and Relativity Space compare?
Both companies work in Space Propulsion. Phase Four was founded in 2015 and Relativity Space in 2015.
Which is larger, Phase Four or Relativity Space?
Relativity Space reports the larger workforce, with 1,285 employees versus 5.
Which has more launches, Phase Four or Relativity Space?
Relativity Space leads with 3 tracked launches (0% success rate).