SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
Phase Four logo Phase Four Developed electrodeless radio-frequency and multi-mode electric propulsion systems for satellites vs Skyloom Global Develops optical communication terminals and deploys space-based laser data relay networks for LEO satellite constellations and government programs Skyloom Global logo
HEAD-TO-HEAD1 shared sector
Phase Four Skyloom Global
Founded 2015 2017
Headquarters Hawthorne, California Boulder, Colorado
Type private subsidiary
Status closed operating
Employees 5 126
Total funding $35.8M $35.5M
Latest round Series C Corporate
Sectors Space Propulsion, Satellite Components & Subsystems Satellite Communications, Satellite Components & Subsystems, Space Defense Systems
Products listed 4 5
Federal contracts
Launches
Leaders listed Steve Kiser, M. Umair Siddiqui, Simon Halpern Marc Eisenberg, Marcos Franceschini, Santiago Tempone
News mentions 0 4
SHARED SECTORS
FREQUENTLY ASKED

How do Phase Four and Skyloom Global compare?

Both companies work in Satellite Components & Subsystems. Phase Four was founded in 2015 and Skyloom Global in 2017.

Which is larger, Phase Four or Skyloom Global?

Skyloom Global reports the larger workforce, with 126 employees versus 5.

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