Firefly Aerospace vs Sierra Space
Firefly Aerospace
Enabling our world to launch, land, and orbit in space. Anytime. Anywhere
1033 employees · est. 2017 · Cedar Park, United States
Sierra Space
Defending Today. Defining Tomorrow.™
1370 employees · est. 2021 · Louisville, United States
Firefly Aerospace is the older company (2017 vs 2021).
Side-by-Side Comparison
| Metric | Firefly Aerospace | Sierra Space |
|---|---|---|
| Founded | ||
| Founded | 2017 older | 2021 |
| Headquarters | ||
| Headquarters | Cedar Park, United States | Louisville, United States |
| Employees | ||
| Employees | 1033 | 1370 |
| Industry | ||
| Industry | Space, Telecom, Transportation | Industrial, Manufacturing, Space |
| Funding Stage | ||
| Funding Stage | Public | Series C |
| Total Funding | ||
| Total Funding | $1.61B | $2.26B |
| Funding Rounds | ||
| Funding Rounds | 11 | 5 |
| Services | ||
| Services | Rocket launches (Alpha & Eclipse), Lunar landings and payload operations (Blue Ghost), Orbital vehicle operations (Elytra), Spacecraft production and autonomy (Ocula Imaging) | Satellite Design and Manufacturing, Spaceplane Development, Rocket Engines & Propulsion Systems, National Security Mission Support, Environmental Systems for Microgravity |
| Target Customers | ||
| Target Customers | Government space agencies (e.g., NASA), Defense contractors (e.g., U.S. Space Force), Aerospace corporations (e.g., Lockheed Martin), Commercial payload customers, Space technology and communication service providers | Government and Defense Agencies, Space Exploration Organizations, Commercial Spaceflight Companies, On-Orbit Manufacturing Facilities, Research and Development Laboratories |
| Taxonomy | ||
| Taxonomy | Space And Defense TechnologySatellite LaunchMoon LandingLaunch VehiclesLunar LandersOrbital Vehicles +9 | Defense TechSatellite PlatformsReusable SpaceplanesHypersonic TechnologiesPropulsion SystemsSpace Infrastructure +9 |
| Website | ||
| Website | fireflyspace.com | sierraspace.com |
About Firefly Aerospace
Firefly Aerospace, founded in 2017 and headquartered in the United States, operates at the cutting edge of space and defense technology. The company offers unique capabilities, enabling government and commercial clients to launch, land, and operate in space with unparalleled flexibility. Its ability...
About Sierra Space
Sierra Space, founded in 2021 and headquartered in the United States, is carving a niche as a pivotal entity within the Industrial, Manufacturing, Space, and Transportation sectors. Embodying the slogan "Defending Today. Defining Tomorrow.™", this defense technology powerhouse is acknowledged for it...
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Compiled from the BounceWatch company index. We last looked at Firefly Aerospace on 24 Sep 2026, and Sierra Space on 15 Sep 2026. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.
