Nebulock Raises $25M Series A for AI-Native Contextual Security

What happened

Nebulock announced a $25M Series A on June 25 led by FirstMark. Existing investors (Bain Capital Ventures, Decibel, Zetta, Step Function) participated, bringing total funding above $33M.

Context and impact

Nebulock competes with SOC ('security operations center') automation startups like Anvilogic and Prophet Security. The thesis: instead of generating more alerts, deploy LLM agents to triage existing alerts contextually (endpoint + cloud + identity) and produce high-confidence findings. This addresses alert fatigue, the biggest problem in enterprise SOCs today.

Details

• Lead: FirstMark; existing: Bain Capital Ventures, Decibel, Zetta, Step Function
• Total funding: >$33M
• 300M+ agentic investigations, 4,000+ high-confidence findings
• Vendor-agnostic across endpoint, cloud and identity telemetry
• Emerged from stealth one year ago