The space compute startup just became one of the fastest Y Combinator companies to reach unicorn status, with plans to launch an orbital data center on SpaceX’s Starship.
“We wanted to prove that we could run state of the art terrestrial chips in space,” Starcloud CEO and founder Philip Johnston said this week. The company closed a $170 million Series A led by Benchmark and EQT Ventures just 17 months after its Y Combinator demo day, pushing its total funding to $200 million and its valuation to $1.1 billion. The round is the latest signal that investors see real potential in moving data center infrastructure to orbit as power shortages and political obstacles slow construction on Earth.
Starcloud already has a working satellite in orbit. It launched its first spacecraft carrying an Nvidia H100 GPU in November 2025 and used it to train an AI model in orbit, a claimed first for the industry. A second satellite called Starcloud 2 is set to launch later this year, carrying a more powerful Nvidia Blackwell chip, an AWS server blade, and a bitcoin mining computer. The company is also developing Starcloud 3, a 200 kilowatt three-ton spacecraft designed to launch from SpaceX’s Starship and fit into the same deployment system used for Starlink satellites.
Johnston believes Starcloud 3 will be the first orbital data center cost-competitive with ground-based infrastructure, targeting around five cents per kilowatt hour of power if commercial Starship launch costs reach around $500 per kilogram. The problem is Starship is not flying commercially yet. Johnston expects access to open up between 2028 and 2029, and acknowledges that without frequent Starship launches, space data centers cannot compete on energy costs. Until then, the company plans to keep launching smaller versions on Falcon 9.
The business runs on two models for now. One involves selling processing power to other spacecraft already in orbit, like its current deal analyzing radar data for Capella Space. The second, longer-term model targets pulling workloads away from terrestrial cloud providers once launch costs fall enough to make it viable. Significant technical challenges remain, including power generation, chip cooling, and synchronizing large numbers of GPUs across spacecraft flying in formation.
Starcloud is not alone in this race. Aetherflux, Google’s Project Suncatcher, and Aethero are all building space data center businesses. SpaceX itself has asked the US government for permission to operate a million satellites for distributed compute. Johnston said he sees room to coexist, arguing SpaceX is primarily building for its own Grok and Tesla workloads rather than positioning as a third party cloud provider.
The gap between space and ground-based compute is still enormous. Only dozens of advanced GPUs currently exist in orbit while Nvidia sold an estimated four million units to terrestrial data centers in 2025 alone. The entire Starlink network produces around 200 megawatts of energy while data centers with more than 25 gigawatts of capacity are already under construction in the United States. Space compute is real, but scaling it to compete with Earth is still years away.
Starcloud raises $170 million Series A at a $1.1 billion valuation to build GPU-powered data centers in space, with plans to launch on SpaceX Starship by the end of the decade.
(Image credit: Starcloud, Youtube)
