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 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
Antaris Open Cosmos
Founded 2021 2015
Headquarters Los Altos, California Harwell, United Kingdom
Type private private
Status operating operating
Employees 21 177
Total funding $7.7M $57M
Latest round Seed Series B
Sectors Space Software & Mission Tools, Satellite Manufacturing Satellite Manufacturing, Earth Observation & Remote Sensing, Satellite Communications
Products listed 4 4
Federal contracts
Launches
Leaders listed Tom Barton, Karthik Govindhasamy, John Trionfo Rafel Jorda Siquier, Jordi Barrera Ars, Aleix Megias Homar
News mentions 0 15
SHARED SECTORS
FREQUENTLY ASKED

How do Antaris and Open Cosmos compare?

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

Which is larger, Antaris or Open Cosmos?

Open Cosmos reports the larger workforce, with 177 employees versus 21.

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