SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.03
Open Cosmos logo Open Cosmos Designs, builds, launches, and operates small satellites for Earth observation, telecommunications, navigation, and science missions 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
Open Cosmos Sierra Space
Founded 2015 2021
Headquarters Harwell, Oxfordshire, United Kingdom Louisville, Colorado, USA
Type private private
Status operating operating
Employees 177 1,072
Total funding $57M $2.2B
Latest round Series B Series C
Sectors Satellite Manufacturing, Earth Observation & Remote Sensing, Satellite Communications Satellite Manufacturing, Space Propulsion, Space Stations & Habitats
Products listed 4 7
Federal contracts 1 ($6.5M)
Launches
Leaders listed Rafel Jorda Siquier, Jordi Barrera Ars, Aleix Megias Homar Dan Jablonsky, Janet Kavandi, Troy Lahr
News mentions 15 0
SHARED SECTORS
FREQUENTLY ASKED

How do Open Cosmos and Sierra Space compare?

Both companies work in Satellite Manufacturing. Open Cosmos was founded in 2015 and Sierra Space in 2021.

Which is larger, Open Cosmos or Sierra Space?

Sierra Space reports the larger workforce, with 1,072 employees versus 177.

Which has more US federal contracts, Open Cosmos or Sierra Space?

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

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