SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
AST SpaceMobile logo AST SpaceMobile Operates a space-based cellular broadband network delivering 4G and 5G connectivity directly to standard smartphones via LEO satellites vs Sierra Space Designs and manufactures satellite platforms, reusable spaceplanes, expandable habitats, and propulsion systems for national security and civil space Sierra Space logo
HEAD-TO-HEAD1 shared sector
AST SpaceMobile Sierra Space
Founded 2017 2021
Headquarters Midland, Texas Louisville, Colorado
Type public private
Status operating operating
Employees 613 1,072
Total funding $2.2B
Latest round Series C
Sectors Satellite Communications, Ground Segment & Networks, Satellite Manufacturing Satellite Manufacturing, Space Propulsion, Space Stations & Habitats
Products listed 5 7
Federal contracts 1 ($6.5M)
Launches
Leaders listed Abel Avellan, Scott Wisniewski, Andrew Johnson Dan Jablonsky, Janet Kavandi, Troy Lahr
News mentions 1 0
SHARED SECTORS
FREQUENTLY ASKED

How do AST SpaceMobile and Sierra Space compare?

Both companies work in Satellite Manufacturing. AST SpaceMobile was founded in 2017 and Sierra Space in 2021.

Which is larger, AST SpaceMobile or Sierra Space?

Sierra Space reports the larger workforce, with 1,072 employees versus 613.

Which has more US federal contracts, AST SpaceMobile or Sierra Space?

Sierra Space has been awarded more, with $6.5M across 1 awards.

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