depthfirst, a San Francisco, CA‑based company developing security solutions for businesses, raised $40 M in Series A funding.

The round was led by Accel with participation from Alt Capital, BoxGroup, Liquid 2 Ventures, Mantis VC, SV Angel, and angel investors including Jeff Dean, Kirsten Green, Colin Evans, Logan Kilpatrick, and Julian Schrittwieser.

The company intends to use the funds to support its research and development, go‑to‑market efforts, and hiring across applied research, engineering, product, and sales.

Founded in 2024 and led by CEO Qasim Mithani, depthfirst is an applied AI lab developing new security solutions for businesses facing modern threats to their systems. Its AI‑native security platform, General Security Intelligence, builds context on a company’s code, infrastructure, and business logic to find complex vulnerabilities, focus on the important issues, and provide developers with ready‑to‑merge fixes.