Key Takeaways
- • Neo, founded by former SentinelOne COO Nick Warner, raised $100 million in seed and Series A funding led by Andreessen Horowitz and Bessemer Venture Partners, emerging from stealth on July 20, 2026.
- • Neo positions itself as an "Agentic Software Control" company, building security infrastructure and controls specifically designed to protect enterprise AI agents and agentic software across organizations.
- • The platform combines inventory management, risk assessment, and attribution capabilities to address the emerging security gaps created by autonomous AI agent deployment in enterprise environments.
- • The funding round reflects significant institutional investor confidence in the market demand for AI agent security solutions as enterprises accelerate adoption of autonomous software systems.
- • Boston-based Neo's founding team draws on deep cybersecurity expertise from SentinelOne, a public endpoint protection platform company, indicating domain knowledge in endpoint security now being applied to AI infrastructure.
Summary
Neo, a Boston-based cybersecurity startup, emerged from stealth mode on July 20, 2026, announcing a $100 million funding round led by Andreessen Horowitz and Bessemer Venture Partners. The company was founded by Nick Warner, the former Chief Operating Officer of SentinelOne, the publicly traded endpoint protection vendor. The funding represents both seed and Series A capital, signaling substantial institutional backing for the venture's mission to secure autonomous AI systems.
The startup addresses what founders and investors view as a critical emerging vulnerability in enterprise software infrastructure: the security and control of agentic AI agents. As organizations increasingly deploy autonomous AI agents to handle complex business operations, Neo has built a platform branded as an "Agentic Software Control" company to manage these systems. The platform's core functionality includes inventory management for deployed AI agents, risk assessment capabilities to identify security exposures, and attribution tools to track agent behavior and actions across the enterprise.
The founding of Neo reflects growing recognition among institutional investors and technology leaders that existing security frameworks—originally designed for traditional software and endpoint protection—are insufficient for autonomous AI systems. The timing of the emergence, coupled with the caliber of lead investors, suggests that Andreessen Horowitz and Bessemer Venture Partners view agentic AI security as a foundational infrastructure category. The $100 million raise positions Neo to build out its control and security infrastructure ahead of widespread enterprise adoption of AI agents, mirroring the market expansion patterns seen in previous cybersecurity infrastructure waves.
Warner's background as COO of SentinelOne brings operational and product expertise from a mature, publicly listed security vendor to a nascent category. This pedigree may provide Neo with credibility among enterprise customers evaluating new security vendors for critical autonomous systems, particularly given the high-stakes nature of securing AI agents that execute business-critical decisions with limited human oversight.
The startup addresses what founders and investors view as a critical emerging vulnerability in enterprise software infrastructure: the security and control of agentic AI agents. As organizations increasingly deploy autonomous AI agents to handle complex business operations, Neo has built a platform branded as an "Agentic Software Control" company to manage these systems. The platform's core functionality includes inventory management for deployed AI agents, risk assessment capabilities to identify security exposures, and attribution tools to track agent behavior and actions across the enterprise.
The founding of Neo reflects growing recognition among institutional investors and technology leaders that existing security frameworks—originally designed for traditional software and endpoint protection—are insufficient for autonomous AI systems. The timing of the emergence, coupled with the caliber of lead investors, suggests that Andreessen Horowitz and Bessemer Venture Partners view agentic AI security as a foundational infrastructure category. The $100 million raise positions Neo to build out its control and security infrastructure ahead of widespread enterprise adoption of AI agents, mirroring the market expansion patterns seen in previous cybersecurity infrastructure waves.
Warner's background as COO of SentinelOne brings operational and product expertise from a mature, publicly listed security vendor to a nascent category. This pedigree may provide Neo with credibility among enterprise customers evaluating new security vendors for critical autonomous systems, particularly given the high-stakes nature of securing AI agents that execute business-critical decisions with limited human oversight.
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