SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
CesiumAstro logo CesiumAstro Designs, manufactures, and integrates software-defined phased array communications systems, payloads, and satellites for space, airborne, and ground platforms 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
CesiumAstro Momentus
Founded 2017 2017
Headquarters Austin, Texas San Jose, California
Type private public
Status operating operating
Employees 318 41
Total funding $710.2M
Latest round Series C
Sectors Satellite Components & Subsystems, Satellite Communications, Satellite Manufacturing Space Transportation & Logistics, In-Orbit Servicing & Assembly, Satellite Manufacturing
Products listed 15 3
Federal contracts
Launches
Leaders listed Shey Sabripour, Kenneth Smith, Chris Pappas III John C. Rood, Rob Schwarz, Lon Ensler
News mentions 26 0
SHARED SECTORS
FREQUENTLY ASKED

How do CesiumAstro and Momentus compare?

Both companies work in Satellite Manufacturing. CesiumAstro was founded in 2017 and Momentus in 2017.

Which is larger, CesiumAstro or Momentus?

CesiumAstro reports the larger workforce, with 318 employees versus 41.

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