110+
Engine systems shipped, 2025
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Astra powers satellites in orbit today with electric propulsion trusted by the world's leading operators, and is building the responsive launch vehicle that gives commercial and national-security customers their own path to space.
The Astra Spacecraft Engine is a magnetically shielded Hall-effect thruster for station-keeping, orbit-raising, collision avoidance, and de-orbit. More than 110 systems shipped in 2025 alone, with a 100% on-orbit reliability record across every mission flown.
A dedicated small launch vehicle designed from the ground up for reliability at scale, deployable from mobile, minimal-infrastructure sites. One tonne to low-Earth orbit, purpose-built for commercial constellations and tactically responsive national-security missions.
Rocket 4 is in active development and qualification, with first-stage and upper-stage designs maturing through repeated engine test campaigns. We are building it to fly reliably, then often, not to fly once. Here is where it stands and what it will carry.
Astra is a U.S.-based prime for the national-security space mission, delivering flight-proven propulsion and responsive launch, engineered and manufactured entirely in the United States.
Every engine and vehicle is designed, built, tested, and manufactured on U.S. soil. Full supply-chain sovereignty for sensitive missions.
Mobile, minimal-infrastructure launch built for short-notice, on-demand deployment from anywhere, for sovereign and allied space access.
A 100% on-orbit propulsion record and Category-class launch mission assurance, backed by a factory built for scale.
Astra was founded to make space accessible: cheap, small, and frequent. Founded in 2016 by Chris Kemp and Dr. Adam London, the company reached orbit faster than nearly any launch company in history, and today runs a profitable propulsion business while building its next-generation launch vehicle.
Chris Kemp (former NASA CTO for IT, OpenStack co-founder) and Dr. Adam London set out to industrialize access to space.
Among the fastest companies in history to reach orbit with a privately developed rocket. Acquired Apollo Fusion, seeding the spacecraft-engine business.
Founders took the company private to build with discipline: reliability first, a profitable engine line funding a next-generation vehicle.
110+ engine systems shipped with 100% on-orbit reliability, funding Rocket 4 toward first flight.