Depthfirst Secures $40M to Expand Agentic Approach to Software Security

Why It Matters

The funding validates a shift toward autonomous, AI‑driven security that can keep pace with rapid software development, promising stronger protection for a $400 billion enterprise market.

Key Takeaways

• $40M Series A led by Accel
• AI agents detect 8x more true positives
• False positives cut by 85%
• Customers include AngelList, Supabase, Moveworks
• Targets $400B enterprise security market

Pulse Analysis

The software development lifecycle is increasingly pressured by faster release cycles and sophisticated threat actors leveraging AI. Traditional static analysis tools, built for slower, predictable codebases, struggle to surface complex, context‑dependent vulnerabilities. Depthfirst’s agentic platform addresses this gap by embedding autonomous AI agents that continuously monitor code, infrastructure and workflow signals, creating a dynamic security posture that evolves alongside the application. This approach mirrors the broader industry trend of integrating AI deeper into DevSecOps pipelines, where real‑time risk assessment is becoming a competitive necessity.

Depthfirst’s early performance metrics illustrate the tangible benefits of such technology. By delivering eight times more true‑positive detections than conventional scanners and reducing false positives by 85 %, the platform dramatically improves security‑engineering efficiency. Developers receive actionable, often ready‑to‑merge fixes, cutting remediation time and allowing teams to focus on higher‑value work. AngelList’s security lead likened the solution to adding an autonomous senior engineer, highlighting the productivity gains and the platform’s ability to learn from ongoing scans, thereby continuously refining its threat model.

The $40 million Series A underscores investor confidence in AI‑driven security solutions as a cornerstone of the $400 billion enterprise security market. Backed by Accel and a roster of seasoned angels, Depthfirst is positioned to scale its research, engineering and go‑to‑market capabilities. As AI agents become mainstream, competitors will need to match the depth of contextual analysis and remediation automation Depthfirst offers. The company’s trajectory suggests that autonomous security agents could soon become a standard layer in modern software development, reshaping how organizations defend against increasingly complex cyber threats.