SPACE INDEX COMPANIES INSIGHTS SECTORS PRODUCTS NEWS BLOG ANSWERS RESEARCH ABOUT FOR COMPANIES BUILD / 2026.06.04
Aetherflux logo Aetherflux Develops space-based solar power satellites that collect sunlight in low Earth orbit and transmit energy to portable ground receivers via infrared lasers 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
Aetherflux Sierra Space
Founded 2024 2021
Headquarters San Carlos, California Louisville, Colorado
Type private private
Status operating operating
Employees 40 1,072
Total funding $60M $2.2B
Latest round Series A Series C
Sectors Satellite Manufacturing, In-Space Manufacturing Satellite Manufacturing, Space Propulsion, Space Stations & Habitats
Products listed 3 7
Federal contracts 1 ($6.5M)
Launches
Leaders listed Baiju Bhatt, Joe Yaffe Dan Jablonsky, Janet Kavandi, Troy Lahr
News mentions 0 0
SHARED SECTORS
FREQUENTLY ASKED

How do Aetherflux and Sierra Space compare?

Both companies work in Satellite Manufacturing. Aetherflux was founded in 2024 and Sierra Space in 2021.

Which is larger, Aetherflux or Sierra Space?

Sierra Space reports the larger workforce, with 1,072 employees versus 40.

Which has more US federal contracts, Aetherflux 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.