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 Orbital Sidekick Operates a constellation of hyperspectral imaging satellites and delivers spectral intelligence for energy, mining, agriculture, and defense monitoring Orbital Sidekick logo
HEAD-TO-HEAD1 shared sector
Epsilon3 Orbital Sidekick
Founded 2021 2016
Headquarters Los Angeles, California San Francisco, California
Type private private
Status operating operating
Employees 29 24
Total funding $18.8M $55.4M
Latest round Series A Venture
Sectors Space Software & Mission Tools, Satellite Manufacturing Earth Observation & Remote Sensing, Geospatial Intelligence & Analytics, Satellite Manufacturing
Products listed 6 4
Federal contracts
Launches
Leaders listed Laura Crabtree, Max Mednik, Audrey Fraijo Dan Katz, Tushar Prabhakar, Spencer Hill
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Epsilon3 and Orbital Sidekick compare?

Both companies work in Satellite Manufacturing. Epsilon3 was founded in 2021 and Orbital Sidekick in 2016.

Which is larger, Epsilon3 or Orbital Sidekick?

Epsilon3 reports the larger workforce, with 29 employees versus 24.

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