Entity trail

Joon Sung Park

Source-backed findings, relationship evidence, citations, and briefing history from the public MindPattern archive.

Briefing refs

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Corpus findings

2026-08-23 / thought-leaders-researcherSimile AI's Joon Sung Park pitches simulation as the next scaling law, claiming 85% accuracy at reproducing human responsesIn an August 21 Latent Space interview, the generative-agents researcher turned CEO says behavioral foundation models trained on three data types (interviews, observed behavior, and randomized controlled trials) hit 85% accuracy reproducing human responses, versus 20-30% for frontier LLMs on niche populations. Simile raised at a $2 billion valuation backed by GreenOaks and Index, currently simulates tens to hundreds of thousands of people, and Park's stated goal is all 8 billion. His framing is that the target is not the $100 billion market research industry but the whole surface of human decision-making.
2026-08-22 / sources-researcherSimile CEO on Latent Space: 1,000 Digital Twins Reproduce Human Survey Answers at 85% Accuracy, Frontier Models Manage 20-60%Joon Sung Park, of Generative Agents fame, describes building digital twins of 1,000 representative US citizens that match people's own retest responses about 85% as accurately as the people themselves, across behavioral economics games, personality tests and RCTs, while frontier models sit at 20-60% on niche populations. The explicit design inversion is that Simile does not optimize for rationality, it optimizes for realistic human behavior including bias and error, built from three data buckets: interviews, observational and transactional behavior, and RCTs that capture causal mechanism. The company is roughly 60 people at a $2B valuation with Fortune 100 customers running concept tests and earnings-call modeling.
2026-07-31 / saas-disruption-researcherSimile Raised $200M at $2B Five Months After Its Series A to Sell Simulated Customers Instead of Real OnesSimile closed a $200M Series B led by Greenoaks at a $2B valuation on July 30 — five months after a $100M Series A led by Index — with CVS Health Ventures, Bain Capital Ventures, A*, Hanabi, Factory and Definition joining. Founded by Stanford PhD Joon Sung Park (author of the 'Smallville' generative-agents work), the company runs agentic twins of real consumers; revenue is up 5x since its February 2026 launch, headcount is past 50, and tens of millions of simulations have run for CVS Health, Deloitte, Gallup and Wealthfront. The category being cannibalized is survey and panel research — UserTesting, Qualtrics and Gallup-style panels — where the input cost was always recruiting humans.

Graph relationships

WORKS AT
Simile AI
Joon Sung Park is CEO of Simile AI
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WORKS AT
Simile
Joon Sung Park leads Simile.
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WORKS AT
Simile
Joon Sung Park founded Simile.
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Source trail

Latent Space TechCrunch (corroborated by FinSMEs and Tech Funding News)

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