With more low-Earth-orbit constellations and rising security threats, older hardware is struggling to keep up. CesiumAstro tackles this problem with software-defined communications systems that can adapt in real time for “connect, detect, and defend” missions.
The Austin-based company has raised $470 million in a Series C round. This includes $270 million in new equity and $200 million in debt, which will help scale up manufacturing and satellite production.
Trousdale Ventures led the round, with Woven Capital, Janus Henderson, Airbus Ventures, the Development Bank of Japan, and others also investing. Export-Import Bank and J.P. Morgan are providing debt financing to support a new 270,000-square-foot headquarters near Austin and to expand production lines for CesiumAstro’s Element satellite platform.
Advancing American leadership in AI and reprogrammable communications
Founder and CEO Shey Sabripour founded CesiumAstro in 2017 after decades of working at Raytheon and L3Harris. He wanted to solve the problems of rigid satellite systems that forced operators to use outdated designs and slow upgrade cycles.
CesiumAstro takes a full-stack approach by building satellites, payloads, and processors in-house to meet strict aerospace standards. Its main advantages are modular designs that can be changed in orbit and AI that optimises signals in real time.
The technology is already working in space, with eight SpaceX launches proving its systems in orbit.
Unlike Lockheed, Viasat, or Kymeta, CesiumAstro puts all its capabilities into small, cost-effective units made for dense satellite constellations.
What’s next?
With this new funding, CesiumAstro plans to accelerate Element satellite launches, improve its AI, hire more people in the US, UK, Germany, and Japan, and explore more vehicle-based applications.
The company expects more SpaceX launches for live demos, higher U.S. manufacturing output with help from government incentives, and a stronger position in defence contracts through at least 2027.
