D-Orbit Operates orbital transfer vehicles for last-mile satellite delivery, hosted payload services, space cloud computing, and in-orbit servicing Rhea Space Activity GPS-resilient deep space navigation and secure communication technology for defense and national security 
| D-Orbit | Rhea Space Activity | |
|---|---|---|
| Founded | 2011 | 2018 |
| Headquarters | Italy | Washington, District of Columbia |
| Type | public | private |
| Status | operating | operating |
| Employees | 333 | — |
| Total funding | — | $6.8M |
| Latest round | — | Series A |
| Sectors | Space Transportation & Logistics, In-Orbit Servicing & Assembly, Space Software & Mission Tools | Navigation & Positioning, Space Defense Systems, Space Software & Mission Tools |
| Products listed | 18 | 2 |
| Federal contracts | — | — |
| Launches | — | — |
| Leaders listed | Luca Rossettini, Renato Panesi, Sergio Mucciarelli | Shawn Usman, Kevin Hause, Samuel Lee |
| News mentions | 11 | 0 |
How do D-Orbit and Rhea Space Activity compare?
Both companies work in Space Software & Mission Tools. D-Orbit was founded in 2011 and Rhea Space Activity in 2018.