Cybersecurity Funding Bold Security Emerges From Stealth With $40 Million in Funding The startup relies on AI to turn devices into active agents that understand users’ actions and provide protection in real time. By Ionut Arghire | March 13, 2026 (7:36 AM ET) Flipboard Reddit Whatsapp Whatsapp Email Cybersecurity startup Bold Security on Thursday emerged from stealth mode with $40 million in funding from Bessemer Venture Partners, Picture Capital, and Red Dot Capital Partners. Co-founded by serial entrepreneur Nati Hazut, who also serves as its CEO, New York-based Bold Security relies on AI agents to turn passive security monitoring into active protection. The startup’s solution runs AI directly on enterprise endpoints, focusing on understanding what users and AI tools are doing on those devices, to provide immediate protection. According to Bold, its custom AI models can understand user behavior, the data users interact with, and business context, to detect risks and prevent incidents in real time. By running AI directly on devices, the solution provides behavior monitoring, real-time data classification, and policy enforcement without latency, Bold says. The startup’s approach also provides privacy by default, as all data is analyzed locally, it is never used to train Bold’s AI models, and evidence storage is controlled by the customer. Advertisement. Scroll to continue reading. Bold’s platform has already been adopted by large enterprises in the US. The startup will invest the fresh funding in the long-term evolution of its platform’s AI capabilities to tackle risks in modern enterprise environments, and will accelerate go-to-market efforts to scale globally. “One of the biggest challenges with endpoint security is protecting users without slowing them down. As AI becomes part of daily workflows, Bold helps us apply security in a way that’s effective but unobtrusive, so teams can keep moving fast without creating new risks,” said Shutterfly CISO Jeff Simon. Related: Onyx Security Launches With $40 Million in Funding Related: Jazz Emerges From Stealth With $61M in Funding for AI-Powered DLP Related: Kevin Mandia’s Armadin Launches With $190 Million in Funding Related: Escape Raises $18 Million to Automate Pentesting Written By Ionut Arghire Ionut Arghire is an international correspondent for SecurityWeek. 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