Rhea Space Activity GPS-resilient deep space navigation and secure communication technology for defense and national security Sidus Space Designs, manufactures, and operates LizzieSat small satellites, delivering AI-driven space-based data and hardware manufacturing services for defense and commercial customers 
| Rhea Space Activity | Sidus Space | |
|---|---|---|
| Founded | 2018 | 2012 |
| Headquarters | Washington, District of Columbia | Cape Canaveral, Florida |
| Type | private | public |
| Status | operating | operating |
| Employees | — | 73 |
| Total funding | $6.8M | — |
| Latest round | Series A | — |
| Sectors | Navigation & Positioning, Space Defense Systems, Space Software & Mission Tools | Satellite Manufacturing, Earth Observation & Remote Sensing, Space Defense Systems |
| Products listed | 2 | 3 |
| Federal contracts | — | — |
| Launches | — | — |
| Leaders listed | Shawn Usman, Kevin Hause, Samuel Lee | Carol Craig, Mark Mikolajczyk, Val Ojdanic |
| News mentions | 0 | 9 |
How do Rhea Space Activity and Sidus Space compare?
Both companies work in Space Defense Systems. Rhea Space Activity was founded in 2018 and Sidus Space in 2012.