SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.03
Busek logo Busek Designs and manufactures electric propulsion systems for spacecraft, including Hall effect, electrospray, RF ion, and green monopropellant thrusters vs Relativity Space Manufactures reusable medium-to-heavy-lift launch vehicles using large-scale metal 3D printing and autonomous robotics. Relativity Space logo
HEAD-TO-HEAD1 shared sector
Busek Relativity Space
Founded 1985 2015
Headquarters 11 Tech Circle, Natick, MA 01760 Long Beach, California, USA
Type private private
Status operating operating
Employees 107 1,285
Total funding $200K $1.4B
Latest round Grant Series F
Sectors Space Propulsion, Satellite Components & Subsystems Launch Services, Space Propulsion
Products listed 9 4
Federal contracts
Launches 3 (0%)
Leaders listed Vlad Hruby, James Szabo, John Meikle Eric Schmidt, Maria Seferian, Kevin Wu
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Busek and Relativity Space compare?

Both companies work in Space Propulsion. Busek was founded in 1985 and Relativity Space in 2015.

Which is larger, Busek or Relativity Space?

Relativity Space reports the larger workforce, with 1,285 employees versus 107.

Which has more launches, Busek or Relativity Space?

Relativity Space leads with 3 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.