Fabraix says it hit a $1.04M annualized run rate three months after joining Y Combinator

Fabraix said on September 11, 2026, that it had reached a $1.04 million annualized run rate, up from zero revenue when it entered Y Combinator three months earlier. The company describes its product as autonomous red-teaming agents that find vulnerabilities in AI agents. It claims its own offensive models, which power those testing agents, outperform frontier models.