Palo Alto Networks has acquired Koi Security, a startup focused on enterprise file security, for $400 million, SiliconANGLE reported on Feb. 17 local time.

Koi Security provides a platform that blocks risky file downloads inside corporate networks and verifies AI training datasets. When a developer tries to download a file from an external site, Koi’s system switches to an "approval request" button and runs an immediate security check. It analyses whether the file developer has engaged in malicious activity and monitors behaviour in the file code and on the user’s system.

Koi also automatically delays updates, allowing administrators to conduct security checks, given that open-source file code updates can pose security threats. Downloaded files are continuously monitored by an embedded threat detection engine, and any threats detected are displayed on an administrator dashboard. Administrators can delete the file or isolate it from the network and can roll back recently updated files to an earlier version.

Palo Alto Networks plans to integrate Koi’s technology into its security platforms Cortex XDR and Prisma AIRS. Cortex XDR is an endpoint security solution that protects cloud instances and employee devices, while Prisma AIRS is focused on protecting AI workloads.

Hadar Oren (하다 오렌), senior vice president of product management at Palo Alto Networks, stressed that "Koi is designed to eliminate grey areas in security for AI-native ecosystems and enable companies to safely manage agent-based tools."