Starcloud raises $170M to build AI data centres in orbit, hits $1.1B valuation
What's the deal? Starcloud, a Redmond, Washington-based startup building data centres in space, has raised $170 million in a Series A round at a $1.1 billion valuation — making it the fastest company in Y Combinator's history to reach unicorn status, just 17 months after its demo day.
The round was led by Benchmark and EQT VenturesDealroom has a profile for this one. Try Dealroom → and brings total capital raised to $200 million. MacquarieDealroom has a profile for this one. Try Dealroom →, NFX, NebularDealroom has a profile for this one. Try Dealroom →, Y Combinator, and HarpoonDealroom has a profile for this one. Try Dealroom → also participated, alongside angel investors including former BoeingDealroom has a profile for this one. Try Dealroom → chief executive Dennis MuilenburgDealroom has a profile for this one. Try Dealroom → and retired US Air ForceDealroom has a profile for this one. Try Dealroom → General Stephen WilsonDealroom has a profile for this one. Try Dealroom →.
Starcloud launched its first satellite, Starcloud-1, in November 2025 with an Nvidia H100 GPU on board — the first time a GPU of that class has operated in orbit, and the first time an AI model has been trained in space. The new capital will fund Starcloud-2, due to launch in October 2026, and begin development of Starcloud-3 — a three-ton, 200-kilowatt spacecraft designed to launch from SpaceX's Starship and become the first orbital data centre cost-competitive with terrestrial facilities.
Why now? Building a data centre on Earth can take up to five years — and energy constraints are becoming a hard ceiling for AI infrastructure. Space offers near-continuous solar power and passive radiative cooling via the vacuum of space, bypassing both the energy bottleneck and the permitting delays that are throttling terrestrial build-outs. Starcloud-2 is already signed up to run commercial workloads for early customer Crusoe, alongside partnerships with AWSDealroom has a profile for this one. Try Dealroom →, Google CloudDealroom has a profile for this one. Try Dealroom →, and Nvidia.
What could go wrong? The entire cost thesis for orbital data centres depends on Starship. CEO Philip JohnstonDealroom has a profile for this one. Try Dealroom → has said Starcloud-3 will only be competitive at around $500 per kilogram of launch cost — a figure that requires Starship to be flying commercially at scale, something Johnston does not expect until 2028 or 2029. "Until Starship is flying we can basically tread water," he told TechCrunch.
There are also fundamental engineering challenges. An Nvidia A6000 GPU failed during the Starcloud-1 launch. Cooling high-performance chips in orbit requires the largest commercial deployable radiator ever sent to space — a technology that has yet to be proven at scale. And Starcloud faces formidable competition: SpaceX has applied for permission to deploy up to one million orbital compute satellites.
The signal: Orbital data centres are moving from science fiction to funded infrastructure bets. Starcloud's $1.1 billion valuation, EQT's involvement — the firm operates more than 70 terrestrial data centres — and Macquarie Capital's participation all signal that serious infrastructure capital is beginning to flow into space compute. The energy crisis for AI is pushing investors to back ideas that would have been unthinkable five years ago.
Sources:
Business Wire
TechCrunch
Reuters
Pulse 2.0
Morningstar
Geek Wire
Space News
Philip Johnston's LinkedIn post
Image credit:
Starcloud
J.V.
