Comparison
Axiom Space vs Sierra Space
Axiom Space — Commercial human spaceflight services and developer of the world's first commercial space station. Sierra Space — Commercial space systems including Dream Chaser spaceplane, habitats, and defense satellites.
How they compare
Funding, contracts, and company data pulled directly from the Defense Tech Atlas index — see each company's full profile for sourced citations behind every figure.
| Dimension | Axiom Space | Sierra Space |
|---|---|---|
| Headquarters | Houston, TX | Louisville, CO |
| Founded | 2016 | 2021 |
| Stage | Growth | Series C |
| Total disclosed funding | $1.47B | $2.5B |
| Valuation | ~$2B (Series D, 2026) | $8B (Series C, Mar 2026) |
| Employees | 800+ | 1,800 |
| Contracts tracked | None tracked | 2 contracts |
| Investors tracked | 10 investors | 1 investor |
| Shared focus areas | space, nasa | space, nasa |