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Runsybil

3 viewers · 30d

Total raised

$30.0M

+$30.0M this year

1 filing since 2026 · latest Equity filed

Cumulative raised
LAST ROUND
Equity · $30.0M
ROUNDS
1
INVESTORS
5
FOUNDED
2023
HQ
San Francisco, CA
SECTOR
Cybersecurity
EMPLOYEES
N/A
30D VIEWERS
3

AI overview

Updated

RunSybil builds an AI-native offensive security platform that continuously pentests live applications and infrastructure. Its AI agent, Sybil, autonomously discovers, exploits, and documents real vulnerabilities by interacting with systems through their external interfaces rather than scanning source code. The company was founded in 2023 by CEO Ari Herbert-Voss, OpenAI's first security research hire, and CTO Vlad Ionescu, formerly head of offensive security red teaming at Meta. It raised $40M led by Khosla Ventures in March 2026, with S32, the Anthology Fund, Conviction, and Elad Gil participating.

What sets it apart

Adversarial reasoning rather than signature-based scanning: the agent chains weaknesses across code, APIs, and cloud infrastructure into validated, exploitable attack paths, and runs on every deployment instead of on an annual pentest cycle, so teams get only pre-validated findings.

Funding history

1 round
EquityJan 30, 2026
Form D
+$30.0M$30.0M total

Latest SEC filings

via EDGAR · CIK 0002113497
Form D · Jan 30, 2026View on EDGAR

Products

1 tracked

Sybil

Offensive security / automated penetration testing platform

An autonomous AI agent that performs continuous penetration testing against live applications, APIs, and cloud infrastructure, exploiting and documenting real vulnerabilities without a human in the loop.

  • Autonomous exploitation of live systems through their external interfaces, not static source analysis
  • Full-stack mapping across code, APIs, and cloud infrastructure to catch integration-point vulnerabilities
  • Security feedback on every pull request instead of periodic rescans
  • Adversarial reasoning that chains vulnerabilities into complete attack paths

Links

WebsiteLinkedInSEC EDGAR filings