37 people have left OpenAI or Anthropic to start companies in 2026. Here’s what they’re building.

• Core Automation - "the world's most automated AI lab," starting by automating research itself (ex-OpenAI) • Mirendil - AI research lab building self-accelerating systems that turn compute into scientific and engineering breakthroughs (ex-Anthropic) • River AI - personal AI owned and shaped by each individual (ex-OpenAI) • Math Inc - Solve math, solve everything. (ex-OpenAI) • Resolution — scale and automation for higher confidence in alignment (ex-OpenAI) • Guidelight AI Standards — identifying and promoting safe frontier AI development practices (ex-OpenAI) • Syntony — safety research, governance design, adversarial evaluation → ex-Anthropic • Embrasure — "your data warehouse was never built for autonomous agents" (ex-OpenAI) • Egoist Machines, Inc. (YC S26) Machines — context tooling for AI; their AI Passport lets users control what AI apps know about them (ex-OpenAI) • Rational (YC S26) — agentic business process automation (ex-OpenAI) • Zavify — agentic AI development: custom systems, voice agents, integrations (ex-Anthropic) • Planar — turns individual work into shared state for your team (ex-OpenAI) • Mbason AI — helps candidates find real opportunities without insider connections → ex-Anthropic • Blackstar — building a new personal computer (ex-OpenAI) • Intellagentsia — (ex-OpenAI) • Heyfuture — Predict anything and share it. (ex-Anthropic) And this is only the class of 2026!