Lambda

Lambda is a San Jose-based company that provides GPU-powered cloud infrastructure for artificial intelligence model training and inference. Founded in 2012 by brothers Stephen and Michael Balaban, the company has evolved from a facial recognition startup to become a leading provider of AI compute infrastructure, serving enterprises, research institutions, and AI startups.

Positioning itself as 'The Superintelligence Cloud,' Lambda offers on-demand access to NVIDIA's latest GPU systems including HGX B200, H100, A100, and GH200 instances. The company provides tiered services from self-serve on-demand instances to single-tenant NVIDIA GB300 NVL72 superclusters with Quantum-2 InfiniBand for maximum security and performance.

Lambda builds modular AI factories featuring power, liquid cooling, and high-bandwidth interconnects for organizations training and deploying next-generation AI systems. Notable customers include Apple, Microsoft, Tencent, Kaiser Permanente, MIT, Stanford, Harvard, Caltech, and the Department of Defense.

The company has grown rapidly with the AI infrastructure boom. In 2024, Lambda generated $425 million in revenue with 70% year-over-year growth. The company raised $320 million in Series C funding in early 2024, followed by a $480 million Series D at a $4 billion valuation in February 2025, and over $1.5 billion in Series E funding in November 2025 from TWG Global and USIT.