SOFTWARE security startup Depthfirst has raised $80 million in Series B funding, bringing the total raised to $120 million in less than three months after closing its Series A funding round in mid-January. The investment was led by Meritech Capital, with additional support from Forerunner Ventures, The House Fund, and previous backers Accel, Alt Capital, Box Group, Liquid 2 Ventures, and Mantis VC.
Based in San Francisco, Depthfirst is an applied AI lab founded in 2024 by DeepMind, Databricks, and Faire technical leaders, focused on addressing weaknesses across software and infrastructure layers. Along with the fresh funding, the company announced the launch of Dfs-mini1, its first in-house security model, focused on securing cryptocurrency smart contracts, built on an open source model and trained in security-specific environments.
Depthfirst will use the funds to expand its AI research team, train additional security models across new security domains, and scale enterprise adoption.