Company profile
RunSybil
AI-native black-box offensive security: Sybil agents explore live apps without source code, chain vulns and validate real data exposure.
- Status
- PrivateListed on CyberMerge Startup Radar (private vendors), snapshot Nov 5, 2026
- Valuation
- Undisclosed
- Latest funding
- Undisclosed
- HQ
- San Francisco / US (Startup Radar)
- Last updated
Categories
Funding & valuation
Funding: Undisclosed — no round recorded in the CyberMerge Funding Tracker.
Latest signals
- Startup Radar · Application Security · snapshot Nov 5, 2026 18 Mar 2026: $40M funding led by Khosla Ventures with S32, Anthology Fund (Anthropic/Menlo), Conviction, Elad Gil; angels include Nikesh Arora and Jeff Dean. Co-founded by Ari Herbert-Voss (OpenAI's first security hire) and Vlad Ionescu. Valuation Undisclosed. Source
Competitors
Same-category peers from CyberMerge Research maps, Startup Radar and What's The Use tags.
- ArmadinPrivateAI-native offensive security: autonomous agent swarms chain low-severity weaknesses into validated kill…
- CodeWallPrivateAutonomous AI offensive security: multiple specialized agents start with no credentials or inside knowledge,…
- XBOWPrivateAutonomous offensive security for applications: AI agents find and exploit vulnerabilities and validate each…
- Fleuret AIPrivateAgentic continuous pentesting: two AI agents (Emile and Champollion) map exposed apps, APIs and…
- HadrianPrivateAgentic offensive security: Atlas continuously maps the external attack surface and uses AI agents to…
- Horizon3.aiPrivateAutonomous pentesting (NodeZero) that safely attacks production, chains real attack paths, guides fixes and…
- Backslash SecurityPrivateSecures the AI-native SDLC: IDEs, coding agents, MCP, prompt rules.
- CrackenPrivateAI adversarial exposure validation: attacker-grade agentic AI under human command finds and validates real…
- OX SecurityPrivateAI-native AppSec from prompt to runtime: ASPM/PBOM, VibeSec for AI-generated code, plus OX Cloud CNAPP with…
- Rein SecurityPrivateRuntime security from inside the app: baselines how production code and AI agents actually execute, then…
- &TruthPrivateFormal verification for code, made fast enough for everyday use: instead of testing a sample of inputs, it…
- AvalonXPrivateAI-run continuous penetration testing for small and midsize businesses: its Artemis platform sends…
Figures appear only as recorded in CyberMerge data, with source and date. “Undisclosed” means no published figure in our data. Editorial, not investment advice. Last updated . Spot an error? Tell the desk.