Security Startups

Nebulock

Nebulock builds an AI-driven threat hunting platform that looks for attacker behavior across endpoint, identity, cloud and SaaS telemetry and turns hunt findings into ongoing detections for SOC teams.

Proof of life. Raised a $25M Series A led by FirstMark Capital, June 2026

About Nebulock

Nebulock takes a hunt-first approach to detection. Its agents analyze endpoint, identity, cloud, network and SaaS telemetry over time and look for behaviors rather than known signatures or indicators.

The aim is to catch activity that looks routine event by event, such as an attacker using valid stolen credentials or an unauthorized AI agent.

Findings can be converted into standing detections, and a context graph stores knowledge about the customer's environment. The platform is vendor-agnostic and also offers continuous 24/7 hunting.

Nebulock was founded in 2023 and raised a $25M Series A in June 2026.

Investors

Bain Capital VenturesDecibel PartnersFirstMark CapitalStep Function VenturesZetta Venture Partners
Work at Nebulock? Link to this listing

Optional badge for your site or README. It changes nothing about the listing, its order or its review. Other formats and a dark version: press kit.

<a href="https://securitystartups.com/companies/nebulock"><img src="https://securitystartups.com/badge/listed.svg" alt="Listed on Security Startups" width="184" height="44"></a>