Inferact raises $150M seed to commercialize vLLM inference

On January 23, 2026, Caproasia reported that Inferact, the new startup formed by the core maintainers of the open‑source vLLM inference engine, raised a $150 million seed round at an $800 million valuation. The round is led by Andreessen Horowitz and Lightspeed, with participation from Sequoia Capital, Altimeter Capital, Redpoint Ventures, ZhenFund and others. Inferact plans to keep vLLM open-source while building a commercial platform to run large language models more cheaply and efficiently at scale.