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Nebulock Raises $25.0M Series

Recently funded · $25.0M Series aTechnology, Information and MediaUSView source

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Nebulock, a platform designed to bring autonomous threat hunting to security teams, has secured $25.0M in Series A funding. The round saw participation from a notable group of investors including FirstMark, Bain Capital Ventures (BCV), Decibel Partners, Zetta Venture Partners, and Step Function, alongside individual investors David Waltcher, Dan Nguyen-Huu, and Rak Garg.

The company aims to provide continuous, context-aware coverage across an organization's security stack, helping teams hunt threats across endpoint, identity, cloud, network, and SaaS from a single platform. By focusing on behaviors and TTPs, Nebulock correlates weak signals into actionable hypotheses, bringing expert-level threat hunting capabilities without requiring additional headcount or specialized expertise.

From the source

Ian · Jun 25, 2026

The alert-and-respond era is over. Today we announce a raise of $25M to prove it in a Series A led by FirstMark, with Bain Capital Ventures (BCV), Decibel Partners, Zetta Venture Partners, and Step Function. Less than a year out of stealth, and our hunt-first security operations platform is hitting its stride.

We're building Nebulock around a simple idea: you have to go looking. A decade of SIEM and MDR built an industry around waiting for an alert and then doing something. That legacy model had its moment. The threat landscape moved on. Slapping AI onto alert triage doesn't fix that, it just automates the noise. Any sucker can fire detections on something that looks suspicious but it's much harder to

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