SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.03
Muon Space logo Muon Space Designs, builds, and operates mission-tailored LEO satellite constellations for Earth observation, climate monitoring, and national security applications. vs Portal Space Systems Manufactures solar-thermal-propelled spacecraft buses for high-delta-v, multi-orbit maneuverability and tactically responsive space operations. Portal Space Systems logo
HEAD-TO-HEAD1 shared sector
Muon Space Portal Space Systems
Founded 2021 2021
Headquarters Mountain View, California, USA Bothell, Washington, USA
Type private private
Status operating operating
Employees 197 22
Total funding 260.7M $20M+
Latest round Series B Seed
Sectors Earth Observation & Remote Sensing, Geospatial Intelligence & Analytics, Satellite Manufacturing Space Transportation & Logistics, Satellite Manufacturing, Space Propulsion
Products listed 6 3
Federal contracts
Launches
Leaders listed Jonny Dyer, Gregory Smirin, Pascal Stang Jeff Thornburg, Ian Vorbach, Prashaanth Ravindran
News mentions 2 0
SHARED SECTORS
FREQUENTLY ASKED

How do Muon Space and Portal Space Systems compare?

Both companies work in Satellite Manufacturing. Muon Space was founded in 2021 and Portal Space Systems in 2021.

Which is larger, Muon Space or Portal Space Systems?

Muon Space reports the larger workforce, with 197 employees versus 22.

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