Nicolas Bustamante

About

I dropped out of École Normale Supérieure at 21 to build Doctrine, which became Europe’s largest legal information platform with 25,000 customers. We sold Doctrine to Summit Partners, a private equity firm, in 2023, and then to LexisNexis.

I moved to San Francisco and started Fintool, born out of my admiration for Buffett and Munger. I wanted to build an AI that could analyze businesses exactly like Warren does: reading filings, building conviction one annual report at a time. Fintool was backed by Y Combinator, Anthology Fund, and Menlo Ventures, and acquired by Microsoft in March 2026.

Now at Microsoft, I lead a team building proactive AI agents that understand your work, operate in the background, and get things done before you ask.

Outside of work, I train Brazilian jiu jitsu and bike around San Francisco.

Writings

Recommendations

Experiments