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 Spacebilt Develops reusable spacecraft through on-orbit assembly and reprovisioning, extending operations and cutting lifecycle costs by 80% Spacebilt logo
HEAD-TO-HEAD1 shared sector
Portal Space Systems Spacebilt
Founded 2021 1998
Headquarters Bothell, Washington London, Florida
Type private private
Status operating operating
Employees 22 7
Total funding $20M
Latest round Seed
Sectors Space Transportation & Logistics, Satellite Manufacturing, Space Propulsion In-Orbit Servicing & Assembly, In-Space Manufacturing, Space Transportation & Logistics
Products listed 3 3
Federal contracts
Launches
Leaders listed Jeff Thornburg, Ian Vorbach, Prashaanth Ravindran Dave Swan, Dennis Wingo, Steve Kwast
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Portal Space Systems and Spacebilt compare?

Both companies work in Space Transportation & Logistics. Portal Space Systems was founded in 2021 and Spacebilt in 1998.

Which is larger, Portal Space Systems or Spacebilt?

Portal Space Systems reports the larger workforce, with 22 employees versus 7.

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