SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
Momentus logo Momentus Operates orbital service vehicles and manufactures satellite buses for in-space transportation, hosted payloads, and proximity 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
Momentus Open Cosmos
Founded 2017 2015
Headquarters San Jose, California Harwell, United Kingdom
Type public private
Status operating operating
Employees 41 177
Total funding $57M
Latest round Series B
Sectors Space Transportation & Logistics, In-Orbit Servicing & Assembly, Satellite Manufacturing Satellite Manufacturing, Earth Observation & Remote Sensing, Satellite Communications
Products listed 3 4
Federal contracts
Launches
Leaders listed John C. Rood, Rob Schwarz, Lon Ensler Rafel Jorda Siquier, Jordi Barrera Ars, Aleix Megias Homar
News mentions 0 15
SHARED SECTORS
FREQUENTLY ASKED

How do Momentus and Open Cosmos compare?

Both companies work in Satellite Manufacturing. Momentus was founded in 2017 and Open Cosmos in 2015.

Which is larger, Momentus or Open Cosmos?

Open Cosmos reports the larger workforce, with 177 employees versus 41.

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