Alternatives to Sierra Space

Develops and operates small satellites and provides AI-powered Earth observation data analytics.

American aerospace company developing launch vehicles and spacecraft for commercial and government customers.

Manufacturer of small satellites and satellite-based solutions for government and commercial partners.

A lunar exploration company developing landers and rovers to deliver payloads to the Moon and establish a lunar economy.

Manufactures high-performance small spacecraft and components for space missions.

Designs and manufactures spacecraft solutions for government and commercial customers.

Developing reusable spacecraft to manufacture pharmaceuticals and high-end materials in microgravity for Earth use.

European private space ventures redefining independent orbital infrastructure.

Specializes in plasma propulsion systems for spacecraft.

Specializes in propulsion systems for small satellites.

Building satellites for very low Earth orbit (VLEO) to advance global connectivity and insight.

Provider of space domain awareness, intelligence, and advanced missile defense technology solutions.

A Spanish company developing small satellite launch vehicles.

Develops radiation shielding solutions for space.

Japanese space tech startup developing hybrid rocket propulsion systems for satellite, launch, defense, and security applications.

Develops electrospray propulsion systems for satellites.

Provides optical and photonic components for space.

A next-generation commercial space station for the post-ISS low-Earth orbit economy.

Developing the world's first fully reusable satellite platform to enable high-tempo, cost-effective orbital operations.

Develops innovative, iodine-fueled electric propulsion systems for small satellites.