SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
Portal Space Systems logo Portal Space Systems Manufactures solar-thermal-propelled spacecraft buses for high-delta-v, multi-orbit maneuverability and tactically responsive space operations vs Space Solar Develops space-based solar power technology to beam continuous clean energy from geostationary orbit to Earth via wireless power transmission Space Solar logo
HEAD-TO-HEAD1 shared sector
Portal Space Systems Space Solar
Founded 2021 2022
Headquarters Bothell, Washington Didcot, United Kingdom
Type private private
Status operating operating
Employees 22 10
Total funding $20M $508K
Latest round Seed Seed
Sectors Space Transportation & Logistics, Satellite Manufacturing, Space Propulsion Satellite Manufacturing, Satellite Components & Subsystems
Products listed 3 2
Federal contracts
Launches
Leaders listed Jeff Thornburg, Ian Vorbach, Prashaanth Ravindran Martin Soltau, Sam Adlen, David Homfray
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Portal Space Systems and Space Solar compare?

Both companies work in Satellite Manufacturing. Portal Space Systems was founded in 2021 and Space Solar in 2022.

Which is larger, Portal Space Systems or Space Solar?

Portal Space Systems reports the larger workforce, with 22 employees versus 10.

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