Lambda
Lambda is an AI / GPU Cloud company founded in 2012 and based in San Francisco, United States. It has raised $2.4B in total funding, most recently a Series E in 2025.
Lambda, founded in 2012 in San Francisco by brothers Stephen and Michael Balaban, builds GPU cloud services and on-premise AI hardware for training and inference, positioning itself as a 'superintelligence cloud.' The company sells on-demand and reserved GPU clusters, private cloud, and physical GPU workstations and servers, and is among NVIDIA's backed cloud partners. Lambda raised over $1.5 billion in a Series E led by TWG Global in November 2025, following a $480 million round in early 2025 at a roughly $2.5 billion valuation that included NVIDIA. The company is reportedly targeting an IPO in the second half of 2026, and its roughly $350 million pre-IPO convertible-note raise is now reported closed, led by Mubadala Capital with conversion at about a 20% discount to the IPO price. Revenue for the fiscal year ended September 2025 was reported above $520 million, heavily concentrated in Microsoft and Nvidia.
One of the longest-running independent GPU clouds, Lambda spans both cloud and on-prem hardware and is a frequently-cited IPO candidate in the AI-infrastructure wave.
lambda.ai ↗·AI / GPU Cloud·
United States·private 
