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.

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

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

A Spanish company developing small satellite launch vehicles.

Develops radiation shielding solutions for space.

Provides optical and photonic components for space.

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

Develops electric propulsion solutions for satellites.

Building data centers in space.

Market infrastructure platform for the global space economy.

Global aerospace and defense company producing business jets, combat vehicles, submarines, and IT services.

Developing green propulsion systems for space missions.