River AI

AI Infrastructure · Personal AI · Venture Capital

Funding

River AI raises $1.1B seed round led by General Catalyst and AMP PBC

Investors are betting on a former xAI co-founder's pedigree alone, since the startup has no product, revenue, or launch date yet.

• River AI raised $1.1 billion led by General Catalyst and AMP PBC, with NVIDIA, AMD Ventures, Y Combinator and Temasek also investing, valuing the company at roughly $5 billion.
• Founder Igor Babuschkin is an xAI co-founder who previously worked on generative modeling and reinforcement learning at Google DeepMind and led large-scale training at OpenAI.
• River's API offers LoRA fine-tuning and reinforcement learning for open-weight models, claiming full RL training runs in 15-20 minutes with no infrastructure team, at 2-4x the cost savings of closed-source rivals.
• Babuschkin is personally putting up to $100 million of his own money into the round, which arrived less than four months after the company was incorporated in Nevada on April 20, 2026.
• The deal lands as OpenAI, Anthropic and xAI pour tens of billions into frontier training, and as Applied Compute separately negotiates a $3 billion round led by Elad Gil, underscoring how much capital keeps flowing into AI regardless of product stage.
• The round shows investors will commit over a billion dollars purely on a frontier-lab researcher's reputation, a sign that talent flight from labs like xAI now commands instant, outsized capital before any product exists.