Simile, a startup that builds AI-simulated versions of real consumers for marketing and product research, has raised $200 million in a Series B round at a $2 billion valuation, just five months after announcing its $100 million Series A.

The new round was led by Greenoaks, with participation from earlier backers Index Ventures, along with Hanabi, Bain Capital Ventures, A*, Factory, Definition, and CVS Health Ventures. CVS is also one of Simile’s marquee customers, alongside Wealthfront, Deloitte and Gallup, according to the company.

Simile was founded by Joon Sung Park, a Stanford PhD graduate whose doctoral research included a project called “Smallville,” in which AI agents simulated human daily life in detail, including attending virtual parties and forming relationships with one another. That research became the technical foundation for Simile’s commercial product, which lets companies run large numbers of simulated consumer interactions before testing ideas on real people.

The company says its technology allows Fortune 100 enterprises to run tens of millions of simulations to predict how real customers might respond to a new product, advertisement or price change, a process traditionally handled through focus groups and surveys. Revenue has grown fivefold since the product launched in February, and the company’s workforce has grown past 50 employees.

The rapid fundraising pace, two rounds within five months and a twentyfold jump in valuation from its Series A, reflects heightened investor interest in AI startups that promise to cut the cost and time of traditional market research. Simile’s approach sits within a broader wave of “synthetic user” and AI simulation startups that have attracted venture funding over the past year as companies look for cheaper alternatives to real-world testing.

The company has not disclosed specific plans for the new funding, though similar rounds in the sector have typically gone toward expanding engineering teams and enterprise sales, and toward acquiring additional computing capacity to run larger volumes of simulations for enterprise clients.