Sequoia Co-Leads $25M Series A Round in AI Security Startup Cymphony

9 Sept 2026, 6:30 pm · 3d ago · 1 min read · TechCrunch AI

Amount

$25M

Stage

Series A

Lead

Sequoia

AI cybersecurity startup Cymphony has raised $25 million in a Series A funding round co-led by Sequoia and the SMBC Fin Atlas Beyond Fund. The investment values the enterprise security company at over $100 million. Cymphony focuses on mitigating cybersecurity vulnerabilities and enterprise risks emerging from the deployment and integration of autonomous AI agents across corporate environments. The fresh capital will enable the startup to expand its platform capabilities, enhance threat detection algorithms, and scale its engineering and sales operations globally as enterprise adoption of agentic AI systems continues to surge rapidly.