SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
Eta Space logo Eta Space Develops cryogenic propellant management systems for in-space storage, transfer, and refueling, and liquid hydrogen infrastructure for terrestrial energy applications vs Momentus Operates orbital service vehicles and manufactures satellite buses for in-space transportation, hosted payloads, and proximity operations Momentus logo
HEAD-TO-HEAD1 shared sector
Eta Space Momentus
Founded 2019 2017
Headquarters Rockledge, Florida San Jose, California
Type private public
Status operating operating
Employees 10 41
Total funding $27.2M
Latest round Grant
Sectors Space Transportation & Logistics, Lunar Services, Space Propulsion Space Transportation & Logistics, In-Orbit Servicing & Assembly, Satellite Manufacturing
Products listed 6 3
Federal contracts
Launches
Leaders listed Dr. William Notardonato John C. Rood, Rob Schwarz, Lon Ensler
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Eta Space and Momentus compare?

Both companies work in Space Transportation & Logistics. Eta Space was founded in 2019 and Momentus in 2017.

Which is larger, Eta Space or Momentus?

Momentus reports the larger workforce, with 41 employees versus 10.

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