depthfirst Announces $40M Series A to Secure the World’s Software

depthfirst, an applied AI Lab solving security’s AI-era problems, led by Daniele Perito, Qasim Mithani, and Andrea Michi, has secured $40M Series A round, led by Accel with participation from Alt Capital, BoxGroup, Liquid 2 Ventures, Mantis VC, SV Angel, and notable angel investors including Jeff Dean, Kirsten Green, Colin Evans, Logan Kilpatrick, and Julian Schrittwieser. depthfirst’s General Security Intelligence platform introduces a unified AI system that detects, triages, and remediates vulnerabilities across every layer of software and infrastructure.

AI-generated code is accelerating software vulnerabilities, while businesses face autonomous, always-on threats. depthfirst’s General Security Intelligence deploys agents that understand systems end-to-end and respond with the speed and intelligence of AI-powered attackers, hardening software stacks for resilient enterprises and safe AI.

“Software is now being created faster than it can be secured,” said Qasim Mithani, co-founder and CEO. “Defense must evolve as fundamentally as AI has changed offense.”

In just four months since launch, depthfirst’s agents uncovered 8× more true-positive vulnerabilities than traditional static analysis tools while cutting false positives by 85%. The platform also achieved state-of-the-art results on CyberGym, improving performance by 90% over previous benchmarks, and secured customers including Lovable, Supabase, Moveworks, and AngelList.

“depthfirst acted like an autonomous senior product-security engineer,” said Alberto Martinez, Head of Security, AngelList. “It surfaced top issues, tracked context across scans, eliminated false positives, and delivered ready-to-merge fixes, doubling our security-engineering efficiency.”

Existing tools detect yesterday’s threats, but depthfirst’s AI-first platform fully understands code, context, and threat models to catch vulnerabilities before exploitation, keeping pace with the rapid evolution of AI-driven attacks.

“depthfirst has transformed code security at Moveworks,” said Damian Hasse, CISO. “It detects defects and complex threats while suggesting fixes, improving security and code quality.”

Founded in 2024, depthfirst secures software by combining AI expertise with security research. Series A funding will accelerate R&D, go-to-market, and key hires.

“Outdated tools can’t meet modern threats,” said Sara Ittelson, Partner at Accel. “depthfirst is positioned to transform the $400B enterprise security market as AI adoption rises.”