SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
EnduroSat logo EnduroSat Designs, builds, and operates software-defined small satellites and shared satellite platforms for commercial and scientific missions worldwide 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
EnduroSat Sierra Space
Founded 2015 2021
Headquarters Sofia, Bulgaria Louisville, Colorado
Type private private
Status operating operating
Employees 325 1,072
Total funding $181.6M $2.2B
Latest round Series C Series C
Sectors Satellite Manufacturing, Satellite Components & Subsystems Satellite Manufacturing, Space Propulsion, Space Stations & Habitats
Products listed 37 7
Federal contracts 1 ($6.5M)
Launches
Leaders listed Raycho Raychev, Victor Danchev, Emmanuel Sauzay Dan Jablonsky, Janet Kavandi, Troy Lahr
News mentions 6 0
SHARED SECTORS
FREQUENTLY ASKED

How do EnduroSat and Sierra Space compare?

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

Which is larger, EnduroSat or Sierra Space?

Sierra Space reports the larger workforce, with 1,072 employees versus 325.

Which has more US federal contracts, EnduroSat 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.