Simile vs OpenAI
Side-by-side comparison of AI visibility scores, market position, and capabilities
Raised $100M Series A in February 2026 led by Index Ventures with Fei-Fei Li and Andrej Karpathy backing, after CVS Health and Telstra adopted its AI digital twin platform to replace focus groups.
About
Simile is a Stanford spinout founded in 2025 by Percy Liang, Michael Bernstein, and Joon Sung Park that built the first AI simulation of society — a platform populated by generative agents trained on real human behavioral data to faithfully simulate how specific demographic segments make decisions. Enterprises use Simile to replace slow, expensive focus groups and A/B tests with instant, scalable AI simulations. Early enterprise customers include CVS Health for inventory optimization and Telstra for customer strategy decisions.
GPT-5 and o3 model family at $25B+ ARR; $840B post-money valuation (Feb 2026 round); ChatGPT 1B+ users; largest private fundraise in history ($110B). Competing with Anthropic Claude 4, Google Gemini 3, Meta Llama 4.
About
OpenAI is a San Francisco-based artificial intelligence company developing and deploying large-scale AI systems — including GPT-4o, o1 reasoning models, DALL-E 3 image generation, Sora video generation, and the Whisper speech recognition model — through the ChatGPT consumer product and OpenAI API for developers and enterprise customers. Founded in 2015 as a nonprofit by Sam Altman, Elon Musk, Greg Brockman, and others and restructured into a capped-profit company, OpenAI raised $157 billion in total funding including a $6.6 billion round in October 2024 at a $157 billion valuation and a $40 billion round from SoftBank in 2025, generating $3.7 billion in annualized revenue in 2024 with 400 million weekly ChatGPT users.
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