Nebulock
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Founders
About
Nebulock is a San Francisco-based, AI-native contextual security analytics platform that helps enterprise security teams hunt, convict, and attribute threats across endpoint, identity, cloud, network, and SaaS environments 12. The company was founded by Damien Lewke, who previously held product leadership roles at CrowdStrike and Arctic Wolf 2. Since emerging from stealth in mid-2025, Nebulock reports running over 300 million agentic investigations and surfacing 4,000+ high-confidence findings, with named customers including Cribl, Bain Capital, and HealthEdge 13.
Funding History
| Date | Round | Amount | Lead | Co-investors |
|---|---|---|---|---|
| 2025-07-29 | Seed | $8.5M | Bain Capital Ventures | Decibel, In-Q-Tel, Zetta Venture Partners, Step Function, Aviso Ventures 45 |
| 2026-06-25 | Series A | $25M | FirstMark | Bain Capital Ventures, Decibel, Zetta Venture Partners, Step Function 12367 |
What Investors Say
“As attacks become faster, more credentialed, and more autonomous, enterprises need a new security layer built around context, behavior, and continuous reasoning.” — David Waltcher, Partner at FirstMark, in the June 25, 2026 announcement 6
What Founders Say
“Breaches used to take months; now they take tokens.” — Damien Lewke, Founder & CEO, Nebulock, June 25, 2026 76
Sources
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BusinessWire, “Nebulock Raises $25 Million Series A to Bring a Hunt-First Context to the Enterprise,” June 25, 2026. Accessed June 2026. https://www.businesswire.com/news/home/20260625381441/en/Nebulock-Raises-$25-Million-Series-A-to-Bring-a-Hunt-First-Context-to-the-Enterprise↩↩↩
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Damien Lewke (Founder & CEO, Nebulock), LinkedIn announcement post, June 25, 2026. Accessed June 2026. https://www.linkedin.com/posts/damienlewke_today-were-announcing-nebulocks-25m-series-activity-7475897102372454400-6VSN↩↩↩
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SiliconANGLE, “Nebulock raises $25M to expand hunt-first security platform,” June 25, 2026. Accessed June 2026. https://siliconangle.com/2026/06/25/nebulock-raises-25m-expand-hunt-first-security-platform/↩↩
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SiliconANGLE, “Threat hunting startup Nebulock closes $8.5M to grow AI threat detection engine,” July 29, 2025. Accessed June 2026. https://siliconangle.com/2025/07/29/threat-hunting-startup-nebulock-closes-8-5m-grow-ai-threat-detection-engine/↩
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Axios, “A new AI threat-hunting startup has emerged from stealth with backing from Bain Capital Ventures, In-Q-Tel,” July 29, 2025. Accessed June 2026. https://www.axios.com/2025/07/29/nebulock-ai-threat-startup-bain-capital↩
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Pulse 2.0, “Nebulock Raises $25 Million Series A Led By FirstMark,” June 2026. Accessed June 2026. https://pulse2.com/nebulock-raises-25-million-series-a-led-by-firstmark/↩↩↩
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SecurityWeek, “Nebulock Raises $25 Million for AI-Native Contextual Security,” June 2026. Accessed June 2026. https://www.securityweek.com/nebulock-raises-25-million-for-ai-native-contextual-security/↩↩