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 Epsilon3 Provides AI-powered procedure execution and resource management software for complex engineering, manufacturing, testing, and operations Epsilon3 logo
HEAD-TO-HEAD1 shared sector
EnduroSat Epsilon3
Founded 2015 2021
Headquarters Sofia, Bulgaria Los Angeles, California
Type private private
Status operating operating
Employees 325 29
Total funding $181.6M $18.8M
Latest round Series C Series A
Sectors Satellite Manufacturing, Satellite Components & Subsystems Space Software & Mission Tools, Satellite Manufacturing
Products listed 37 6
Federal contracts
Launches
Leaders listed Raycho Raychev, Victor Danchev, Emmanuel Sauzay Laura Crabtree, Max Mednik, Audrey Fraijo
News mentions 6 0
SHARED SECTORS
FREQUENTLY ASKED

How do EnduroSat and Epsilon3 compare?

Both companies work in Satellite Manufacturing. EnduroSat was founded in 2015 and Epsilon3 in 2021.

Which is larger, EnduroSat or Epsilon3?

EnduroSat reports the larger workforce, with 325 employees versus 29.

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