RTX Aerospace and defense conglomerate making aircraft engines, avionics, missiles, air defense systems, and satellites Sierra Space Designs and manufactures satellite platforms, reusable spaceplanes, expandable habitats, and propulsion systems for national security and civil space 
| RTX | Sierra Space | |
|---|---|---|
| Founded | 2020 | 2021 |
| Headquarters | United States | Louisville, Colorado |
| Type | private | private |
| Status | operating | operating |
| Employees | 185,000 | 1,072 |
| Total funding | — | $2.2B |
| Latest round | — | Series A |
| Sectors | Space Defense Systems, Satellite Components & Subsystems, Space Propulsion | Satellite Manufacturing, Space Propulsion, Space Stations & Habitats |
| Products listed | 7 | 7 |
| Federal contracts | — | 1 ($6.5M) |
| Launches | — | — |
| Leaders listed | — | Dan Jablonsky, Janet Kavandi, Troy Lahr |
| News mentions | 0 | 2 |
How do RTX and Sierra Space compare?
Both companies work in Space Propulsion. RTX was founded in 2020 and Sierra Space in 2021.
Which is larger, RTX or Sierra Space?
RTX reports the larger workforce, with 185,000 employees versus 1,072.
Which has more US federal contracts, RTX or Sierra Space?
Sierra Space has been awarded more, with $6.5M across 1 awards.