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 Rocket Lab USA Rocket Lab USA logo
HEAD-TO-HEAD1 shared sector
Phase Four Rocket Lab USA
Founded 2015 2006
Headquarters Hawthorne, California Long Beach, California
Type private public
Status closed operating
Employees 5 1,627
Total funding $35.8M
Latest round Series C
Sectors Space Propulsion, Satellite Components & Subsystems Launch Services, Satellite Components & Subsystems, Satellite Manufacturing
Products listed 4 16
Federal contracts 1 ($7.0M)
Launches 130 (65%)
Leaders listed Steve Kiser, M. Umair Siddiqui, Simon Halpern Sir Peter Beck, Adam Spice, Frank Klein
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Phase Four and Rocket Lab USA compare?

Both companies work in Satellite Components & Subsystems. Phase Four was founded in 2015 and Rocket Lab USA in 2006.

Which is larger, Phase Four or Rocket Lab USA?

Rocket Lab USA reports the larger workforce, with 1,627 employees versus 5.

Which has more US federal contracts, Phase Four or Rocket Lab USA?

Rocket Lab USA has been awarded more, with $7.0M across 1 awards.

Which has more launches, Phase Four or Rocket Lab USA?

Rocket Lab USA leads with 130 tracked launches (65% success rate).

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