Ent.AI emerged from stealth with a $100 million seed round led by Decibel Partners, with Sequoia Capital and Felicis among the backers. The company is building AI-native endpoint security -- protection for laptops, servers, and devices designed for a threat landscape where adversaries increasingly use AI to find and exploit vulnerabilities.
The headline is the round shape. A $100 million seed is, by any historical standard, enormous, and it reflects how aggressively the best funds are willing to pre-empt category winners in AI security rather than wait for traction. When Sequoia and Felicis write into a seed at this size, they're paying up for option value on a potential platform.
“It's the same dynamic powering the broader 2026 cyber wave: security is one of the few categories where AI changes both the offense and the defense simultaneously.”
The bet underneath is that legacy endpoint tools, built for a slower threat environment, will be outpaced by AI-driven attacks -- and that the defenders who rebuild for that world from scratch can take share fast. It's the same dynamic powering the broader 2026 cyber wave: security is one of the few categories where AI changes both the offense and the defense simultaneously.