SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.03
Epsilon3 logo Epsilon3 Provides AI-powered procedure execution and resource management software for complex engineering, manufacturing, testing, and operations. vs Sidus Space Designs, manufactures, and operates LizzieSat small satellites, delivering AI-driven space-based data and hardware manufacturing services for defense and commercial customers. Sidus Space logo
HEAD-TO-HEAD1 shared sector
Epsilon3 Sidus Space
Founded 2021 2012
Headquarters Los Angeles, California, USA Florida’s Space Coast
Type private public
Status operating operating
Employees 29 73
Total funding $18.8M
Latest round Series A
Sectors Space Software & Mission Tools, Satellite Manufacturing Satellite Manufacturing, Earth Observation & Remote Sensing, Space Defense Systems
Products listed 6 3
Federal contracts
Launches
Leaders listed Laura Crabtree, Max Mednik, Audrey Fraijo Carol Craig, Mark Mikolajczyk, Val Ojdanic
News mentions 0 9
SHARED SECTORS
FREQUENTLY ASKED

How do Epsilon3 and Sidus Space compare?

Both companies work in Satellite Manufacturing. Epsilon3 was founded in 2021 and Sidus Space in 2012.

Which is larger, Epsilon3 or Sidus Space?

Sidus Space reports the larger workforce, with 73 employees versus 29.

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