Proteus Space

Proteus Space designs and develops electronic propulsion systems for spacecraft, specifically multi-step field-emission thrusters with built-in collision avoidance systems for cube satellites and small satellites. The company's propulsion technology has applications in low Earth orbit (LEO), lunar, and Martian missions, providing efficient and compact electric propulsion that enables satellites to maneuver, maintain orbit, avoid collisions, and extend operational lifetimes. Proteus Space differentiates itself through its focus on miniaturized electric propulsion systems specifically designed for the growing small satellite and cube satellite market, where size, weight, and power constraints make traditional propulsion systems impractical. The company's multi-step field-emission thruster architecture provides higher efficiency and specific impulse compared to simpler electric propulsion designs, while the integrated collision avoidance system adds an autonomous safety layer critical for operating in increasingly congested orbital environments. Founded in 2021 and headquartered in Glendale, California, Proteus Space has raised approximately $14.4 million in a Seed round backed by SAIC, Moonshots Capital, Lavrock Ventures, The Veteran Fund, Mana Ventures, AIN Ventures, Capital Factory, Industrious Ventures, and Crosscut Ventures.