The problem
Alert-driven security tools miss attackers using valid credentials; teams lack time to hunt proactively
What they do
AI agents that continuously hunt threats and write detections across a company's security stack
Traction Fortune 500 plus Cribl, HealthEdge, Bain Capital as customers; 300M+ agentic investigations run
Hiring trend
- Open roles
- 5
- Headcount
- ~46-57
~14 staff (Oct 2025) → 35-57 in 2026; +31% QoQ to ~46 (Aug 2026, Caplight)
Hiring in
- Remote (US)
Funding
- Last round
- $25M
- Stage
- Series A
- Date
- Jun 2026
Led by FirstMark
- Hiring+15 open roles on the live job board (3–9 roles = +1)
- Funding recency+1.5Series A · $25M, Jun 2026 (4 months ago): 6 months or less = +1.5
- Traction+0.75Some growth: Fortune 500 plus Cribl, HealthEdge, Bain Capital as customers; 300M+ agentic investigations run
- Red flags0None found in the last 24 months
- Total3.251 + 1.5 + 0.75 − 0 = 3.25 → Steady (1.5–3.49)
Distance (Unproven) is a separate read on how long the lead can last. It doesn't change the score.
Distance
Unproven · edge: learns from use
Small Series A with early enterprise logos in a crowded AI-SOC field where CrowdStrike and Palo Alto ship similar agents to the same buyers.
Sources: Business Wire: Nebulock $25M Series A (Jun 2026) ↗ · FirstMark: Announcing our investment in Nebulock (Jun 2026) ↗
Open ops roles
No ops roles open right now
Last checked Oct 25, 2026