SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
Gilmour Space Technologies logo Gilmour Space Technologies Develops hybrid-propellant launch vehicles, a modular satellite bus, and operates Australia's first licensed orbital spaceport vs Sierra Space Designs and manufactures satellite platforms, reusable spaceplanes, expandable habitats, and propulsion systems for national security and civil space Sierra Space logo
HEAD-TO-HEAD1 shared sector
Gilmour Space Technologies Sierra Space
Founded 2015 2021
Headquarters Gold Coast, Australia Louisville, Colorado
Type private private
Status operating operating
Employees 176 1,072
Total funding $141.1M $2.2B
Latest round Series E Series C
Sectors Launch Services, Satellite Manufacturing, Spaceports & Range Services Satellite Manufacturing, Space Propulsion, Space Stations & Habitats
Products listed 4 7
Federal contracts 1 ($6.5M)
Launches 2 (0%)
Leaders listed Adam Gilmour, James Gilmour, Ashley Hasforth Dan Jablonsky, Janet Kavandi, Troy Lahr
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Gilmour Space Technologies and Sierra Space compare?

Both companies work in Satellite Manufacturing. Gilmour Space Technologies was founded in 2015 and Sierra Space in 2021.

Which is larger, Gilmour Space Technologies or Sierra Space?

Sierra Space reports the larger workforce, with 1,072 employees versus 176.

Which has more US federal contracts, Gilmour Space Technologies or Sierra Space?

Sierra Space has been awarded more, with $6.5M across 1 awards.

Which has more launches, Gilmour Space Technologies or Sierra Space?

Gilmour Space Technologies leads with 2 tracked launches (0% success rate).

Numbers refresh on every render against the live Space Index database. Federal contract data from USAspending.gov; launches from LaunchLibrary2.