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 PLD Space Develops reusable launch vehicles for dedicated and rideshare small satellite missions, with in-house liquid propulsion and vertically integrated manufacturing PLD Space logo
HEAD-TO-HEAD1 shared sector
Phase Four PLD Space
Founded 2015 2011
Headquarters Hawthorne, California, USA Elche, Spain
Type private private
Status closed operating
Employees 5 335
Total funding $35.8M $90.2M
Latest round Series C Debt Financing
Sectors Space Propulsion, Satellite Components & Subsystems Launch Services, Space Propulsion, Suborbital & High-Altitude
Products listed 4 4
Federal contracts — —
Launches — 3 (33%)
Leaders listed Steve Kiser, M. Umair Siddiqui, Simon Halpern Ezequiel Sanchez, Raul Torres, Raul Verdu
News mentions 0 0
SHARED SECTORS
Space Propulsion
FREQUENTLY ASKED

How do Phase Four and PLD Space compare?

Both companies work in Space Propulsion. Phase Four was founded in 2015 and PLD Space in 2011.

Which is larger, Phase Four or PLD Space?

PLD Space reports the larger workforce, with 335 employees versus 5.

Which has more launches, Phase Four or PLD Space?

PLD Space leads with 3 tracked launches (33% success rate).

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