Simile
AI-powered human behavior foundation models
About Simile
Founded in 2025 by Stanford researchers behind the pioneering Generative Agents (Smallville) project, Simile is building what it calls the world’s first AI simulation of society.
Instead of predicting what users might do, its platform creates high-fidelity synthetic people that mirror real human behavior, allowing organizations to simulate customer reactions, policy outcomes, earnings calls, litigation scenarios, and product launches before making real-world decisions.
Simile is already being used by enterprises including CVS Health, Gallup, Wealthfront, Telstra, Suntory, Banco Itaú, and Garnett Station Partners. Customers use the platform to expand qualitative research by up to 15×, test concepts without exposing real customers, rehearse investor earnings calls, and generate insights in minutes instead of months.
Founders
Funding History
Frequently Asked Questions
What is Simile?
Simile is an AI startup that creates synthetic users—AI-powered digital twins of people to help companies simulate human behavior for product development, market research, and business decision-making.
When was Simile founded?
Simile was founded in 2025 by Joon Sung Park, Percy Liang, Michael Bernstein, and Lainie Yallen.
How much funding has Simile raised?
As of August 2026, Simile has raised a total of $300 million across two disclosed funding rounds.
What is Simile's latest funding round?
On 30 July 2026, Simile announced a $200 million Series B led by Greenoaks, bringing its valuation to $2 billion.
Who are Simile's investors?
Investors include Greenoaks, Index Ventures, Hanabi Capital, Bain Capital Ventures, A*, Factory, Definition, CVS Health Ventures, Andrej Karpathy, Fei-Fei Li, Adam D'Angelo, Guillermo Rauch, Scott Belsky, and other angel investors.
What is Simile's valuation?
Simile is valued at $2 billion following its Series B funding announced on 30 July 2026.
Who uses Simile?
Based on our research, customers include CVS Health, Gallup, Wealthfront, Suntory, and Telstra, which use Simile's synthetic users to evaluate products, messaging, and business strategies.
