SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
MaiaSpace logo MaiaSpace Develops a partially reusable methane-fueled mini-launcher for small satellite delivery to low Earth and sun-synchronous orbits vs Phase Four Developed electrodeless radio-frequency and multi-mode electric propulsion systems for satellites Phase Four logo
HEAD-TO-HEAD1 shared sector
MaiaSpace Phase Four
Founded 2022 2015
Headquarters Paris, France Hawthorne, California
Type private private
Status operating closed
Employees 200 5
Total funding $137M $35.8M
Latest round Private Equity Series C
Sectors Launch Services, Space Propulsion Space Propulsion, Satellite Components & Subsystems
Products listed 2 4
Federal contracts
Launches 2 (0%)
Leaders listed Yohann Leroy, Isabelle Quinquis, Yves Aixala Steve Kiser, M. Umair Siddiqui, Simon Halpern
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do MaiaSpace and Phase Four compare?

Both companies work in Space Propulsion. MaiaSpace was founded in 2022 and Phase Four in 2015.

Which is larger, MaiaSpace or Phase Four?

MaiaSpace reports the larger workforce, with 200 employees versus 5.

Which has more launches, MaiaSpace or Phase Four?

MaiaSpace leads with 2 tracked launches (0% success rate).

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