SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
Antaris logo Antaris Provides a cloud-based software platform for satellite mission design, digital twin simulation, flight software, and constellation operations 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
Antaris Portal Space Systems
Founded 2021 2021
Headquarters Los Altos, California Bothell, Washington
Type private private
Status operating operating
Employees 21 22
Total funding $7.7M $20M
Latest round Seed Seed
Sectors Space Software & Mission Tools, Satellite Manufacturing Space Transportation & Logistics, Satellite Manufacturing, Space Propulsion
Products listed 4 3
Federal contracts
Launches
Leaders listed Tom Barton, Karthik Govindhasamy, John Trionfo Jeff Thornburg, Ian Vorbach, Prashaanth Ravindran
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Antaris and Portal Space Systems compare?

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

Which is larger, Antaris or Portal Space Systems?

Portal Space Systems reports the larger workforce, with 22 employees versus 21.

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