Ent Raises $100M in Seed Funding Led by Decibel

The round also saw participation from Sequoia, Crosspoint Capital Partners, Craft Ventures, Shield Capital, Felicis, and In-Q-Tel (IQT).

The company plans to use the funds to expand its operations and support further product development.

The company is developing a new cybersecurity approach based on the idea that AI can speed up cyberattacks, making prevention more important than ever. Ent’s platform helps organizations identify and stop risky actions by both people and AI agents before they turn into security incidents.

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Global 2000 companies are already using Ent in industries such as hospitality, financial services, and defense. Customers rely on the platform to detect insider threats, manage AI usage, prevent data loss, stop security risks, and investigate incidents with a clear understanding of what happened, why it happened, and the best next steps.

As AI becomes a bigger part of everyday work, companies need security tools that can understand activity across browsers, applications, AI workflows, and AI agents in real time. Many traditional security tools only react after an event has happened because they focus on files and system processes rather than user intent. Ent is designed to fill this gap by helping organizations identify and stop risks before they become security incidents.

Hosted in a customer’s own cloud environment, Ent uses a lightweight agent that brings AI-powered analysis directly to endpoints. The platform monitors activity across applications, browsers, workflows, data movement, and local systems, evaluates the intent of both people and AI agents, applies company policies, and can take real-time actions to prevent problems before they occur.

"AI has been a killer app for hackers and offensive researchers, but the industry is waiting for a novel defensive solution that can keep up with the modern era of LLMs,” said Jon Sakoda, Founding Partner at Decibel. "Ent has reimagined what is possible to protect the endpoint by using specialized AI models and adaptive policy enforcement to detect and prevent malicious activity in real time. It’s a game changer for cybersecurity teams who need a paradigm shift to defend their workforce against LLM-based attacks.”

"For a decade, endpoint security has relied on signals that arrive after the users action is complete," said Konstantin Buhler Partner at Sequoia. "By running AI reasoning directly on the device Ent moves from detection to prevention at the moment of decision. That shift is where the next era of endpoint defense gets built."

“We have entered a new era defined by AI-powered attacks, one that demands a return to prevention and resilience,” said Greg Clark, Co-Founder and Managing Partner, Crosspoint Capital Partners. “The level of inference required to stop threats before they materialize must now live directly on the endpoint. Ent is leading this fundamental shift in endpoint protection.”

"Rapid AI adoption is critical for our government partners, and a cornerstone of that adoption is safety and security," said Grant Whiting, Partner at IQT. Ent provides the forensic clarity and preventive protection essential for secure AI operations, enabling organizations to monitor AI usage in real-time, govern risky behavior as it occurs and preserve comprehensive records across every device."

"Security has been stuck in a reactive loop for over a decade, but AI-powered attacks require new thinking," said Elias Manousos, CEO and co-founder of Ent. "AI is changing both how people work and how quickly attackers can act. What once took days now happens in seconds. By the time traditional security systems detect a problem, it is too late. We believe the future of security lies in understanding intent in real time across people and AI agents and stopping risk before it becomes an incident.”

About Ent

Founded by Elias (Lou) Manousos and Brandon Dixon, Ent is a workspace security platform built for the AI era. It helps organizations protect their systems by understanding not only what users, and AI agents are doing, but also the intent behind their actions. By identifying risky behavior in real time, Ent can take action before a security incident occurs, helping companies prevent threats rather than simply responding to them afterward.

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