SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
Antaris logo Antaris Provides a cloud-based software platform for satellite mission design, digital twin simulation, flight software, and constellation operations vs Epsilon3 Provides AI-powered procedure execution and resource management software for complex engineering, manufacturing, testing, and operations Epsilon3 logo
HEAD-TO-HEAD2 shared sectors
Antaris Epsilon3
Founded 2021 2021
Headquarters Los Altos, California Los Angeles, California
Type private private
Status operating operating
Employees 21 29
Total funding $7.7M $18.8M
Latest round Seed Series A
Sectors Space Software & Mission Tools, Satellite Manufacturing Space Software & Mission Tools, Satellite Manufacturing
Products listed 4 6
Federal contracts
Launches
Leaders listed Tom Barton, Karthik Govindhasamy, John Trionfo Laura Crabtree, Max Mednik, Audrey Fraijo
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Antaris and Epsilon3 compare?

Both companies work in Space Software & Mission Tools, Satellite Manufacturing. Antaris was founded in 2021 and Epsilon3 in 2021.

Which is larger, Antaris or Epsilon3?

Epsilon3 reports the larger workforce, with 29 employees versus 21.

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