RunSybil

San Francisco, US · Founded 2023 · Delaware corporation · 3 known investors

RunSybil provides AI-powered active defense and offensive security capabilities for enterprise security teams, automating hacker-level threat detection and response.

AI & Machine LearningCybersecurityin /runsybil @runsybil

Founders & leadership

Brian ByunDirector

Ari Herbert-Vossin 𝕏Executive Officer, Director

Investors · 3

ConvictionSan Francisco · $1M – $25M

Menlo VenturesSan Francisco · $1M – $20M

S32Palo Alto

Reported raises · per SEC filings

Form D private placements

▶$30MraisedApr 2026 · 5 investors · Other Technology

Rule 506(b)

Officers, directors & promoters on the filing

Brian ByunDirector
Ari Herbert-VossExecutive Officer, Director

Offering amount: $30M
Amount sold: $30M
First sale: Jan 2026
Incorporated: Corporation, Delaware, 2023
Federal exemptions: 06b

Full filing on SEC EDGAR ↗

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.