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Runsybil

Attack is your best defense. RunSybil is an AI-powered offensive security platform that continuously tests your applications and infrastructure for exploitable vulnerabilities by reasoning about your system the way an elite human researcher would, but across your entire stack, on every deployment.

United States· 2 rolesNew York City· 1 roleSan Francisco· 1 role · Hybrid

CORE INFO

$40M
Total Funding
Other / Unspecified
Round
2023
Founded

Founded in 2023 by Ari Herbert-Voss and Vlad Ionescu, RunSybil is on a mission to automate hacker intuition. We’re building Sybil: an AI-driven pentester that discovers vulnerabilities before they’re exploited. As adversaries adopt AI to increase their attack surface, we’re putting cutting-edge offensive security into the hands of defenders. Backed by strong investor support and early customer traction, our team is composed of experts from OpenAI, Meta, Mandiant, Palantir, Cruise, Trail of Bits, and Aptiv.

COMPENSATION SNAPSHOT

Cohort too small to score (n < 5). Per-role bands shown below.
Based on publicly available compensation ranges from job postings; exact compensation may vary.
Engineering IC3n = 3
$180K – $245Kmedian $213K
Aggregate
US-only in v1 · only categories with n > 2 shown · in-person / hybrid / remote treated separately where n ≥ 3

HIRING SIGNAL

5
Open roles on their careers page
Snapshot via live ATS poll
—
Net new roles in the last 90 days
Available once weekly history accrues
90-Day VelocityV2 · BACKFILL
Trend builds weekly as historical rows accrue
By Function
Breakdown of open roles
GTM · 1
Engineering · 4
Top Locations
Where hiring is concentrated
Remote-eligible postings counted separately
United States
2
New York City
1
San Francisco (Hybrid)
1
San Francisco / New York CIty
1
SourcesGreenhouseLeverAshbyWorkableSmartRecruitersRipplingRecruiteeFallback · Wellfound, YC Work-at-a-Startup, careers-page scrape

KEY COMPANY ANNOUNCEMENTS

Filter
11 announcements · ranked by importance
Apr 3, 2026FUNDINGForm D filing — Runsybil Corp. (CIK 0002113497)sec.gov
Mar 18, 2026FUNDINGExclusive: AI cybersecurity startup RunSybil raises $40 million in round led by Khosla Ventures | Fortunefortune.com
Mar 18, 2026FUNDINGRunSybil Raises $40M to Build the AI-Native Platform for Offensive Security | RunSybil Blogrunsybil.com
Apr 22, 2026ESSAYWhat Does It Take to Automate Hacker Intuition? | RunSybil Blogrunsybil.com
Nov 10, 2025INTERVIEWEP251 Beyond Fancy Scripts: Can AI Red Teaming Find Truly Novel Attacks?cloud.withgoogle.com
Jul 22, 2026CUSTOMER WINHow Cursor Ships Fast Without Compromising on Security | RunSybil Case Studyrunsybil.com
Jul 16, 2026CUSTOMER WINThe Security Program Carta Built for the Modern Era | RunSybil Case Studyrunsybil.com
Jan 14, 2026PRESSAI’s Hacking Skills Are Approaching an ‘Inflection Point’ | WIREDwired.com
May 1, 2025PRESSRunSybil — RSAC™ 2025 Launch Padyoutube.com
Jun 29, 2026PRESSReproducing Top Results from the AIxCC with General Access AI Models and $600 | RunSybil Blogrunsybil.com
Jan 1, 2023PRESSAbout RunSybil | AI-Native Offensive Securityrunsybil.com