SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.03
Phase Four logo Phase Four Developed electrodeless radio-frequency and multi-mode electric propulsion systems for satellites vs Tesat-Spacecom Manufactures satellite communication payloads and laser inter-satellite link terminals, with equipment aboard more than half of all communication satellites in orbit Tesat-Spacecom logo
HEAD-TO-HEAD1 shared sector
Phase Four Tesat-Spacecom
Founded 2015 1949
Headquarters Hawthorne, California, USA Backnang, Germany
Type private private
Status closed operating
Employees 5 1,100
Total funding $35.8M
Latest round Series C
Sectors Space Propulsion, Satellite Components & Subsystems Satellite Communications, Navigation & Positioning, Satellite Components & Subsystems
Products listed 4 6
Federal contracts
Launches
Leaders listed Steve Kiser, M. Umair Siddiqui, Simon Halpern Dr. Caroline Weishaupl, Matthias von Hayek-Boelingen, Rolf Leonhardt
News mentions 0 36
SHARED SECTORS
FREQUENTLY ASKED

How do Phase Four and Tesat-Spacecom compare?

Both companies work in Satellite Components & Subsystems. Phase Four was founded in 2015 and Tesat-Spacecom in 1949.

Which is larger, Phase Four or Tesat-Spacecom?

Tesat-Spacecom reports the larger workforce, with 1,100 employees versus 5.

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