Palo Alto buys Koi

Palo Alto Networks has bought Israeli cybersecurity startup Koi in a deal reported at about $400 million, adding Koi’s artificial-intelligence security tools to its product lineup. (x.com) The acquisition was reported on April 14, 2026, and centers on technology that helps companies see and control how employees and software agents use artificial-intelligence systems inside large organizations. (x.com) Palo Alto Networks has spent the past two years pushing deeper into artificial-intelligence security as businesses adopt chatbots, coding assistants, and autonomous software tools that can handle sensitive data. Koi’s software fits that push by focusing on governance and monitoring rather than traditional firewall or endpoint protection alone. (x.com) The deal also extends a familiar pattern in Israeli tech: large United States cybersecurity companies buying younger firms founded by veterans of Unit 8200, the Israeli military intelligence unit that has produced a long list of startup founders. That pipeline has remained active through a slower venture market, especially in security software. (x.com) Artificial-intelligence security has become its own category because companies now face a different problem from classic hacking: workers can paste confidential material into external models, and software agents can take actions across internal systems at machine speed. Tools in this market aim to map those uses, set rules, and stop risky behavior before data leaves the company. (x.com) For Palo Alto Networks, buying Koi is another example of using acquisitions to fill product gaps quickly instead of building every new feature internally. The company has used the same playbook across cloud security, security operations, and identity-related tools as enterprise customers consolidate vendors. (x.com) The immediate next step is integration: Koi’s technology is expected to be folded into Palo Alto Networks’ enterprise platform, where it can be sold to the company’s existing customer base rather than as a standalone startup product. That gives Palo Alto Networks a faster way to turn a small specialist team into a feature inside a much larger security stack. (x.com)