SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.03
Exotrail logo Exotrail Designs electric propulsion systems for small satellites and operates orbital transfer vehicles for last-mile delivery and in-orbit services. vs Phase Four Developed electrodeless radio-frequency and multi-mode electric propulsion systems for satellites Phase Four logo
HEAD-TO-HEAD1 shared sector
Exotrail Phase Four
Founded 2017 2015
Headquarters Massy, France Hawthorne, California, USA
Type private private
Status operating closed
Employees 141 5
Total funding $74.6M $35.8M
Latest round Series B Series C
Sectors Space Propulsion, Space Software & Mission Tools, Space Transportation & Logistics Space Propulsion, Satellite Components & Subsystems
Products listed 9 4
Federal contracts
Launches
Leaders listed Jean-Luc Maria, Paul Lascombes, David Henri Steve Kiser, M. Umair Siddiqui, Simon Halpern
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Exotrail and Phase Four compare?

Both companies work in Space Propulsion. Exotrail was founded in 2017 and Phase Four in 2015.

Which is larger, Exotrail or Phase Four?

Exotrail reports the larger workforce, with 141 employees versus 5.

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