generative-agents
(2)
Simile
Simile is a Palo Alto applied AI lab building a foundation model that simulates human behavior. Spun out of Stanford by the team behind the viral 'Smallville' generative-agents paper, the company builds digital twins of customers, voters, employees and analysts so enterprises can rehearse decisions before making them. It emerged from stealth in February 2026 with a $100M Series A led by Index Ventures.
Joon Sung Park
Joon Sung Park is the CEO and Co-founder of Simile, a Stanford-spinout AI company that raised $100M Series A in February 2026 to build digital twins that simulate human behavior and predict consumer decisions. A PhD in Computer Science from Stanford (2025), Park pioneered the concept of 'generative agents' - AI actors with memory, reflection, and planning capabilities - through a landmark 2023 paper that earned a Best Paper Award at UIST and became one of the most-cited works in HCI. Before launching Simile, he was an oil painter trained in hyper-realism, a background that infuses his research with a rare sensitivity to what makes humans human. His digital-twin platform has already signed CVS Health and Telstra as customers, and his model correctly forecast 8 out of 10 questions asked at a real earnings call.