SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.03
OneSpace logo OneSpace Develops small solid-fuel launch vehicles and rocket propulsion systems, and provides rapid-response commercial launch services for microsatellite and nanosatellite customers vs Phase Four Developed electrodeless radio-frequency and multi-mode electric propulsion systems for satellites Phase Four logo
HEAD-TO-HEAD1 shared sector
OneSpace Phase Four
Founded 2015 2015
Headquarters Beijing, China Hawthorne, California, USA
Type private private
Status operating closed
Employees 140 5
Total funding $120M $35.8M
Latest round Series C Series C
Sectors Launch Services, Space Propulsion Space Propulsion, Satellite Components & Subsystems
Products listed 6 4
Federal contracts
Launches 1 (0%)
Leaders listed Shu Chang, David Chen Steve Kiser, M. Umair Siddiqui, Simon Halpern
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do OneSpace and Phase Four compare?

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

Which is larger, OneSpace or Phase Four?

OneSpace reports the larger workforce, with 140 employees versus 5.

Which has more launches, OneSpace or Phase Four?

OneSpace leads with 1 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.