nebulocksec

Agentic hunt-first security operations platform that understands, attributes, and stops threats before breaches become incidents.

[FirstMark @FirstMarkCap]

AI has rewritten the attacker playbook.

The gap between amateur hackers and nation-states is collapsing. The most dangerous attacks now look routine: stolen credentials, valid tokens, normal-looking sessions.

That’s why we’re thrilled to announce FirstMark’s investment in @nebulocksec, led by @DavidWaltcher.

We’re excited to partner with Founder @abcbyDamien and the entire Nebulock team as they build the foundational security analytics stack.

Join the hunt 🎯

[David Waltcher @DavidWaltcher]

Damien Lewke (@abcbyDamien) is the epitome of founder market fit. Couldn’t be more excited to be working with him and the wildly talented team at @nebulocksec.
AI has rewritten the attacker playbook. The gap between an amateur hacker and a nation-state has alarmingly compressed, and the most dangerous attacks now look completely routine: stolen credentials, valid tokens, and sessions that slip past every tool trained to known-bad signatures. Nebulock flips the model: Vespyr, its autonomous threat hunting agent, works continuously across identity, endpoint, and cloud telemetry to hunt for how adversaries actually behave, already running 300M+ investigations and surfacing 4,000+ high-confidence findings that existing tooling missed, often within hours, in environments running best of breed detection / prevention tooling. What's in front of this team is even bigger: they’re building the foundational security analytics stack, baselined on every identity, endpoint, and resource, with agents that get smarter as the collective intelligence grows.
Join the hunt 🎯
@sullivan @rak_garg @dannguyenhuu

[nebulocksec @nebulocksec]

This is just the start. We've quadrupled the team since launch and we're hiring across engineering, product, and go-to-market.

Come build hunt-first, always-on security with us: https://t.co/xxRmATcSFh

[nebulocksec @nebulocksec]

We've raised $25M in Series A funding, led by @FirstMarkCap, with participation from @BainCapVC, @DecibelVC, @ZettaVentures, and Step Function.

We’re building a hunt-first security analytics platform to help defenders tackle the hardest challenge: threats that don’t trip alerts 🔽

[nebulocksec @nebulocksec]

Two years ago we made a bet on how AI could help defenders.

Here's what this looks like in production 9 months out of stealth:

300M+ agentic investigations. 4,000+ incidents prevented.

CISOs from @Cribl_io, @HealthEdge, @BainCapital use us to start with hunts, not alerts.

See it for yourself: https://t.co/zWOWHMh77j