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 Terran Orbital End-to-end satellite manufacturer delivering modular spacecraft platforms, mission operations, and ground services for defense, civil, and commercial customers worldwide. Terran Orbital logo
HEAD-TO-HEAD1 shared sector
Phase Four Terran Orbital
Founded 2015 2013
Headquarters Hawthorne, California, USA Boca Raton, Florida
Type private subsidiary
Status closed operating
Employees 5 325
Total funding $35.8M
Latest round Series C
Sectors Space Propulsion, Satellite Components & Subsystems Satellite Manufacturing, Satellite Components & Subsystems, Space Defense Systems
Products listed 4 13
Federal contracts
Launches
Leaders listed Steve Kiser, M. Umair Siddiqui, Simon Halpern Peter Krauss, Cheryl Paquete, Michael Young
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Phase Four and Terran Orbital compare?

Both companies work in Satellite Components & Subsystems. Phase Four was founded in 2015 and Terran Orbital in 2013.

Which is larger, Phase Four or Terran Orbital?

Terran Orbital reports the larger workforce, with 325 employees versus 5.

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