S
Simile
Core neolabBuilds behavioral simulation models that simulate how people respond to decisions
Raised, confirmed$300M2 confirmed rounds
Valuation, confirmed$2B30 Jul 2026 post-money
Valuation, reported—no open report
Founded2025Palo Alto, CA, US
Key facts
| Field | Value | Source · checked |
|---|---|---|
| Classification | Core neolabBehavioral-simulation lab founded by Stanford generative-agents researchers; $200M Series B at a $2B post-money valuation co-led by Greenoaks and Index Ventures (Jul 2026) | |
| Founded | 2025 | |
| Headquarters | Palo Alto, CA, US | simile.com expanded from our small home in Palo Alto to a global team of 50+ employeeschecked 9 Nov 2026 |
| Founders | Joon Sung Park, Michael Bernstein, Percy Liang, Lainie Yallen | |
| Website | simile.com | simile.com Simulate how real customers respond to a launch, price change, or campaign — before you ship.checked 9 Nov 2026 |
| Careers | jobs.ashbyhq.com9 open roles on 9 Nov 2026 | simile.comchecked 9 Nov 2026 |
| Profiles and work | X @simile_aiLinkedIn | How links are checkedchecked 10 Nov 2026 |
Funding rounds
Simile has raised $300M in rounds confirmed by the company, a regulator or two independent outlets. Sources disagree on at least one confirmed round, so the total may count some money twice; see the note on that round. Status rules: methodology.
| Date | Round | Amount | Valuation | Investors | Status | Source · checked |
|---|---|---|---|---|---|---|
| 30 Jul 2026 | Series B | $200M | $2B post-money | Lead: Greenoaks, Index Ventures; Hanabi Capital, Bain Capital Ventures, A*, Factory, CVS Health Ventures, Definition | Confirmedsources conflict | Simile we’ve raised over $200 million at a $2 billion post-money valuation, co-led by Greenoaks and Index Ventures+1 more sourcechecked 9 Nov 2026 |
| 12 Feb 2026 | Series A | $100M | — | Lead: Index Ventures; Hanabi Capital, A*, Bain Capital Ventures, Andrej Karpathy, Fei-Fei Li, Adam D’Angelo, Guillermo Rauch, Scott Belsky | Confirmed | Simile We are backed by $100M in funding led by Index Ventures, with participation from Hanabi, A*, Bain Capital Ventures, Andrej Karpathy, Fei‑Fei Li, Adam D’Angelo, Guillermo Rauch, Scott Belsky, and others.+1 more sourcechecked 9 Nov 2026 |
Notes on these rounds
- 30 Jul 2026 Series B: Company states 'over $200 million'.
People
| Name | Role | Before | Now | Source · checked |
|---|---|---|---|---|
| Joon Sung ParkXLinkedInScholarSite | Co-founder & CEO | Stanford University (PhD researcher) | Current | |
| Michael BernsteinXLinkedInScholarSite | Co-founder | Stanford University (Professor) | Current | siliconangle.com Park co-founded Simile with fellow computer scientists Michael Bernstein andchecked 9 Nov 2026 |
| Percy LiangXScholarSite | Co-founder | Stanford University (Director, Center for Research on Foundation Models) | Current | implicator.ai As founding director of Stanford's Center for Research on Foundation Models, Liang co-authored the 2021 paper that introduced the term "foundation model" to the field.checked 9 Nov 2026 |
| Lainie YallenLinkedIn | Co-founder | Hebbia (Employee number eight), Inovia Capital (Investor) | Current |
Professional facts from public sources only. How people records are handled.
What it has shipped
| Name | Kind | Date | Open weights | Source · checked |
|---|---|---|---|---|
| Simile simulation platform | product | Feb 2026 | No | simile.com Our AI-driven simulations show how and why customers, employees, or populations respond to changechecked 9 Nov 2026 |
| Confidence model | model | 25 Aug 2026 | No | simile.com trained a first-of-its-kind confidence model that predicts the accuracy of every simulationchecked 9 Nov 2026 |
Latest posts on X
The most recent posts from @simile_ai, the X account of Simile, quoted as posted. Replies and reposts are left out. How posts are selected.
Simile joined @Disney Accelerator’s 2026 Demo Day to share our work with Disney Experiences, exploring how advanced analytics can help teams understand guests better. Thank you to our Disney collaborators. We’re excited to keep building together! youtube.com/live/cxYW8NDUcoQ
View the post on X · With 4 images
Progress in behavioral simulation starts with rigorous research. We were proud to sponsor CoLM’s Social Simulation with LLMs workshop, join the panel, and present best paper awards. Congrats to the winners, and thank you to the researchers pushing the field forward!
View the post on X · With 4 images
Thanks to everyone who joined our SF Tech Week happy hour and fireside chat with Chinmay and Tiffany from our Modeling and Evals teams! Great conversations on what it takes to simulate human behavior, why rigorous evaluation matters, and where the field is headed.
View the post on X · With 1 image
checked 10 Nov 2026
Commonly cited, checked
Figures and statements about Simile that circulate in lists and summaries, and what the sources support.
| Claim | Finding | Source |
|---|---|---|
| $200M Series B at $2B valuation | Confirmed by the company (30 Jul 2026), preceded by a $100M Series A led by Index Ventures (12 Feb 2026). | simile.com we’ve raised over $200 million at a $2 billion post-money valuation, co-led by Greenoaks and Index Ventures |
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