Simile AI, founded by Stanford CS PhD Joon Sung Park, announced a $200 million Series B at a $2 billion valuation led by Greenoaks with participation from Index Ventures and Bain Capital Ventures. The company develops generative agents and foundation models for simulating individual and societal behavior, with applications in retail and decision testing. Academic supporters including Percy Liang and Michael Bernstein highlighted its research trajectory and commercial potential, noting parallels to early OpenAI work. The round reflects investor confidence in scaling simulation technologies for real-world use cases.