SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.03
Exolaunch logo Exolaunch Provides rideshare launch services, mission management, and satellite deployment hardware for smallsats and CubeSats across multiple launch vehicles worldwide. vs Phase Four Developed electrodeless radio-frequency and multi-mode electric propulsion systems for satellites Phase Four logo
HEAD-TO-HEAD1 shared sector
Exolaunch Phase Four
Founded 2010 2015
Headquarters Berlin, Germany Hawthorne, California, USA
Type private private
Status operating closed
Employees 53 5
Total funding $35.8M
Latest round Series C
Sectors Launch Services, Satellite Components & Subsystems, Space Transportation & Logistics Space Propulsion, Satellite Components & Subsystems
Products listed 9 4
Federal contracts
Launches
Leaders listed Robert W. Sproles, Dmitriy Sternharz, Jeanne Allarie Steve Kiser, M. Umair Siddiqui, Simon Halpern
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Exolaunch and Phase Four compare?

Both companies work in Satellite Components & Subsystems. Exolaunch was founded in 2010 and Phase Four in 2015.

Which is larger, Exolaunch or Phase Four?

Exolaunch reports the larger workforce, with 53 employees versus 5.

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