Ent Emerges From Stealth With $100M Seed for AI Security

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Ent, a workplace security company based in Santa Clara, California, has come out of stealth with $100 million in a Seed round, one of the largest seed rounds in cybersecurity history. The financing was led by Decibel Partners, with Craft Ventures, Crosspoint Capital Partners, Felicis, IQT, Sequoia Capital, and Shield Capital also taking part.

The company emerged on June 16, 2026, with an AI-powered workspace security platform. Its system analyzes the behavior of both users and AI agents in real time, aiming to head off cyber threats before they cause damage rather than reacting after the fact.

The founding team carries a notable track record. Ent was started by Elias Manousos, who goes by Lou and serves as CEO, and Brandon Dixon, the CTO. The two previously co-founded RiskIQ, a digital threat management and attack surface intelligence company that Microsoft acquired in 2021 for more than $500 million. Members of the team also worked on the Microsoft Security Copilot effort, giving the company a roster familiar with the challenges of securing modern, AI-heavy environments.

The size of the round reflects how seriously investors are taking the security questions that come with the spread of AI agents inside companies. As more autonomous software gains access to workplace systems, the surface area for potential attacks grows, and Ent is pitching itself as a way to watch and control that activity as it happens.

With $100 million in the bank and a team that has built and sold a security business before, Ent is starting its public life with both capital and credibility behind it.