Starcloud

Starcloud is a Redmond, Washington-based space-tech startup building data centers in orbit to provide GPU compute for AI workloads. The company leverages continuous solar energy and radiative cooling in space to offer dramatically lower electricity costs than terrestrial data centers. In November 2025 it launched Starcloud-1, the first satellite carrying an NVIDIA H100 GPU, and subsequently ran the first AI model trained in space. Starcloud raised a $170 million Series A in March 2026, reaching a $1.1 billion valuation — the fastest unicorn in Y Combinator history, just 17 months after YC Demo Day. Total funding stands at approximately $200 million. The company was co-founded by Philip Johnston (CEO), Ezra Feilden (CTO), and Adi Oltean (Chief Engineer).