Simile raises at $2 billion valuation to model human behavior

Simile is developing a foundation model for human behavior that creates high-fidelity agentic twins based on real human interviews, behavioral data, and scientific literature. The Palo Alto company says enterprises can query these agents to predict responses to product changes, pricing, messaging, policies, and other interventions.

Founded in 2025 by Stanford researchers behind generative agents research and the term foundation model, Simile emerged from stealth in February 2026 with a $100 million Series A. It later closed a more than $200 million Series B at a $2 billion post-money valuation, bringing disclosed funding to more than $300 million.

Customers including CVS Health, Wealthfront, Deloitte, Gallup, Suntory, Telstra, and Banco Itaú are using the platform for research, scenario testing, and decision support. Simile reports fivefold revenue growth since launch, more than 50 employees, and tens of millions of simulations run for Fortune 100 companies.

The company is competing in an emerging synthetic research market tied to an industry estimated at $90-120 billion annually. Key challenges include independent validation, privacy and consent, regulatory scrutiny, and proving that simulations remain reliable across varied real-world settings.