SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
Epsilon3 logo Epsilon3 Provides AI-powered procedure execution and resource management software for complex engineering, manufacturing, testing, and operations vs Open Cosmos Designs, builds, launches, and operates small satellites for Earth observation, telecommunications, navigation, and science missions Open Cosmos logo
HEAD-TO-HEAD1 shared sector
Epsilon3 Open Cosmos
Founded 2021 2015
Headquarters Los Angeles, California Harwell, United Kingdom
Type private private
Status operating operating
Employees 29 177
Total funding $18.8M $57M
Latest round Series A Series B
Sectors Space Software & Mission Tools, Satellite Manufacturing Satellite Manufacturing, Earth Observation & Remote Sensing, Satellite Communications
Products listed 6 4
Federal contracts
Launches
Leaders listed Laura Crabtree, Max Mednik, Audrey Fraijo Rafel Jorda Siquier, Jordi Barrera Ars, Aleix Megias Homar
News mentions 0 15
SHARED SECTORS
FREQUENTLY ASKED

How do Epsilon3 and Open Cosmos compare?

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

Which is larger, Epsilon3 or Open Cosmos?

Open Cosmos reports the larger workforce, with 177 employees versus 29.

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