SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
Phase Four logo Phase Four Developed electrodeless radio-frequency and multi-mode electric propulsion systems for satellites vs Voyager Technologies Develops defense electronics, solid and electric propulsion systems, commercial space station infrastructure, and mission-critical space solutions for government and commercial customers Voyager Technologies logo
HEAD-TO-HEAD1 shared sector
Phase Four Voyager Technologies
Founded 2015 2019
Headquarters Hawthorne, California Denver, Colorado
Type private public
Status closed operating
Employees 5 315
Total funding $35.8M
Latest round Series C
Sectors Space Propulsion, Satellite Components & Subsystems Space Stations & Habitats, Satellite Components & Subsystems, Space Defense Systems
Products listed 4 7
Federal contracts
Launches
Leaders listed Steve Kiser, M. Umair Siddiqui, Simon Halpern Dylan Taylor, Phil de Sousa, Paul Tilghman
News mentions 0 3
SHARED SECTORS
FREQUENTLY ASKED

How do Phase Four and Voyager Technologies compare?

Both companies work in Satellite Components & Subsystems. Phase Four was founded in 2015 and Voyager Technologies in 2019.

Which is larger, Phase Four or Voyager Technologies?

Voyager Technologies reports the larger workforce, with 315 employees versus 5.

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