Simile AI Raises $200M Series B at $2B Valuation to Simulate 8B People
Simile AI, an AI social simulation startup, announced a $200M Series B round at a $2B valuation, led by Greenoaks with participation from Index Ventures and Bain Capital Ventures. The company aims to train foundation models of human behavior to accurately simulate all 8 billion people on Earth. This round comes just 5 months after its $100M Series A, showing rapid growth in both funding and valuation.
Confirmed
- Funding: $200M Series B at $2B valuation, led by Greenoaks, with Index Ventures and Bain Capital Ventures participating.
- Timeline: Only 5 months after a $100M Series A.
- Goal: Build synthetic users and train foundation models of human behavior to simulate 8 billion people.
- Key people: Former OpenAI member Sai Krishna has joined; Joon Sung Park, author of generative agent paper, co-founded; Stanford scholar Percy Liang is paying attention.
Why it matters
- Two large funding rounds in a few months show high capital market enthusiasm for human behavior simulation and synthetic users.
- Investor Bennett Siegel noted that Simile is pioneering a new field, advancing AI agent simulation.
2026-07-31 ~ 2026-07-31 · 10 related posts
Primary sources
- [source] Simile AI, Joined by Ex-OpenAI Staff, Raises $200M Series B — skairam · 2026-07-31
- Simile Raises $200M Series B at $2B Valuation to Simulate 8 Billion People — skairam · 2026-07-31
- Synthetic-User Startup Simile Raises $200M Series B at $2B Valuation — skairam · 2026-07-31
- Simile Closes Series B, Pioneering AI Agent-Based Simulations — joon_s_pk · 2026-07-31
- [source] Simile AI Raises $200M Series B at $2B Valuation to Simulate Humanity — joon_s_pk · 2026-07-31
5 near-duplicate retellings: skairam · RishiBommasani · joon_s_pk · joon_s_pk · msbernst