Simile raises $200M at $2B valuation to create AI 'twins' of consumers for market research

Simile, a year-old AI startup, has raised $200 million at a $2 billion valuation in a round led by Greenoaks to develop 'agentic twins'—AI consumer stand-ins for market research. While Simile claims 85% to 99% accuracy and counts CVS Health, Deloitte, and Wealthfront as clients, critics and competitors question whether AI can truly replicate human behavior. The startup aims to eventually model all eight billion people on Earth using real human data from Gallup and interviews.

Simile $200M Series B funding

• ▪Simile raised $200 million at a $2 billion valuation in a funding round led by Greenoaks, with participation from Index Ventures.
• ▪Simile, a year-old startup, raised $100 million less than six months prior to its July 30, 2026 funding announcement.

AI agentic twins technology

• ▪Simile aims to eventually model all eight billion people on Earth.
• ▪Simile builds "agentic twins," which are AI stand-ins representing real consumers that companies can survey to predict human behavior.
• ▪Simile was co-founded by Joon Sung Park and Percy Liang, drawing from a 2023 Stanford University research paper on AI agents.

Market research customer adoption

• ▪CVS Health used 400,000 of Simile's agentic twins to determine how to encourage patients to take their medication.
• ▪Deloitte and the finance app Wealthfront are clients of Simile's market-research simulation platform.
• ▪Simile structures its pricing partly based on the number of AI agents modeled for a client.

Accuracy claims disputed

• ▪Critics and competitors, including Helm, Artificial Societies, and Aaru, question whether AI stand-ins can truly replicate actual human behavior.
• ▪Simile claims its AI agent survey answers achieve an accuracy rate of 85% to 99% depending on the demographic group.

Real data training requirements

• ▪Simile partnered with Gallup to incorporate data from several million additional human participants into its AI model.
• ▪Simile initiated its model by conducting two-hour interviews with 1,000 representative human participants.

AI-generated web ecosystem

• ▪Simile utilizes real human data to generate simulated consumer data for market research.
• ▪Simile's expansion occurs in an online ecosystem increasingly populated by AI agents, where verifying human identity has emerged as an independent industry.

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