Nebulock Raises $25M Series A

Nebulock, based in Boston, is an AI-native contextual security platform that helps enterprises proactively detect and manage threats. The company has raised $25 million in a Series A financing round to support its rapid growth and platform expansion.

Investors

This round was led by FirstMark, with participation from existing investors Bain Capital Ventures, Decibel, Zetta Venture Partners, and Step Function.

Nebulock Use of Funds

The capital will be used to expand the capabilities of the Nebulock platform, specifically to deepen its cross-telemetry correlation and behavioral context graph. The company also plans to scale its engineering and go-to-market teams to meet increasing enterprise demand.

About Nebulock

Founded by former security and product leaders from companies like CrowdStrike, Palo Alto Networks, and Arctic Wolf, Nebulock provides a platform that helps security teams identify malicious activity by analyzing behavioral patterns across endpoint, identity, cloud, network, and SaaS environments. The company aims to move security operations away from reactive, alert-driven models toward proactive, context-rich protection.

Funding Details

Company Website: https://nebulock.io

Company: Nebulock
Raised: $25M
Round: Series A
Funding Date: June 25, 2026
Lead Investor: FirstMark
Additional Investors: Bain Capital Ventures, Decibel, Zetta Venture Partners, Step Function
Company Website: https://nebulock.io
Software Category: Cybersecurity
Source: https://www.businesswire.com/news/home/20260625381441/en/Nebulock-Raises-%2425-Million-Series-A-to-Bring-a-Hunt-First-Context-to-the-Enterprise