depthfirst, an applied AI lab on a mission to secure the world’s software, today announced its $80M Series B round, led by Meritech Capital, with participati...

Depthfirst, an AI cybersecurity startup, has raised $80 million at a $580 million valuation, just two months after a $40 million Series A round. The company is developing "General Security Intelligence" to autonomously detect vulnerabilities and defend against malicious AI attacks. Founded in 2024 by former Google Deepmind researcher Andrea Michi, former Databricks security head Qasim Mithani, and ex-Block cybersecurity chief Daniele Perito, Depthfirst builds AI models from scratch using reinforcement learning rather than adapting existing large language models. The company has over 20 customers and claims 300% revenue growth over the past two quarters. Depthfirst is launching its first in-house model this week, targeting security weaknesses in cryptocurrency smart contracts. Meritech Capital led the Series B round, with total funding now exceeding $120 million.

depthfirst, an applied AI lab focused on software security, has raised $40 million in a Series A round led by Accel. Alt Capital, BoxGroup, Liquid 2 Ventures, Mantis VC and SV Angel participated, alongside angel investors including Jeff Dean and Kirsten Green. Founded in 2024, depthfirst has developed a General Security Intelligence platform that detects, triages and remediates vulnerabilities across software and infrastructure. The company's AI agents uncover eight times more true-positive vulnerabilities than traditional static analysis tools whilst reducing false positives by 85 per cent. The founding team includes technical leaders from Google DeepMind, Databricks and Faire. The funding will support research and development, go-to-market efforts and hiring across applied research, engineering, product and sales.