AI Sec Watch: A Security Intelligence Platform for AI Systems

Luu, T.J.

Sequoia doubles down on Cymphony as AI agents create new enterprise security risks

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Source: TechCrunch (Security)September 9, 2026

Summary

AI agents now access sensitive corporate data and systems like human employees do, but they often bypass the same security controls, creating new risks that enterprises struggle to track. Cymphony, a startup backed by Sequoia Capital with $30 million in funding, is addressing this by building a 'workforce graph' (a unified view showing which employees, AI agents, and other non-human identities can access which systems and data) to help security teams identify and manage these exposures.

Solution / Mitigation

Cymphony's platform uses AI agents to investigate incidents, prioritize risks, and automate remediation including correcting access permissions. The platform can operate largely automatically, or customers can opt for a managed service where Cymphony's security experts handle more complex cases. The startup also helps identify over-exposed files and sensitive data accessible to AI tools, as demonstrated when it found approximately 85,000 files exposed at one U.S. public company and helped close the exposure.