Founder Directory
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Founders166
Known for these resultsRole43%Role is parsed from founder titles in yc.db. Known for 43% of these rows — the rest have no title at all, mostly 2019–2023. Those rows stay in the result and are counted as Unknown, never as No.Bio78%Bio coverage: 78% of these founders have a bio on their YC profile. Every bio-derived facet (ex-company, school, credentials, discipline) is Unknown for the rest.Ex-company18%Ex-company is matched from bios with employment context (ex-, formerly, worked at). 18% of these rows have at least one match.School16%School is matched from bios, case-sensitive for acronyms. 16% of these rows have at least one match.
- Charles Muehlberger@charles_v11Founder/CTO · ConiferS26B2B · San Francisco
- Michael Jeffords@michaelbjeffFounder/CEO · ConiferS26B2B · San Francisco
- Eten Zou@etenal7Founder/CEO · Nebula SecurityS26B2B · San Francisco
- Frank Wu@FrankOverF1owFounder · Nebula SecurityS26B2B · San Francisco
- Xiaochuan Yu@Nyaaaaa_ovoFounder/CTO · Nebula SecurityS26B2B · San Francisco
- Yuan TanFounder · Nebula SecurityS26B2B · San Francisco
- Guy Ben Aharon@GuyBenAharonFounder/CTO · OneCLIS26B2B · San Francisco
- Jonathan Fishner@jonathanfishnerFounder/CEO · OneCLIS26B2B · San Francisco
- Varun WadhwaFounder/CTO · TraceforceS26B2B · San Francisco
- Xia HuaFounder/CEO · TraceforceS26B2B · San Francisco
- Dekai Li@li_dekaiiFounder/CTO · TridentS26B2B · San Francisco
- Junaid Mahmood@whosjunaiddFounder/CEO · TridentS26B2B · San Francisco
- Dan DanayFounder/CEO · Verdict MachineS26B2B · Tel Aviv
- Isaac GrossmanFounder · Verdict MachineS26B2B · Tel Aviv
- Liran KoganFounder/CPO · Verdict MachineS26B2B · Tel Aviv
- Pierre Betouin@pbetouinFounder/CEO · TolmoX26B2B · San Francisco
- Vladimir de Turckheim@poledesfetesFounder · TolmoX26B2B · San Francisco
- Abel JohnFounder/CTO · LogosGuardF25B2B · San Francisco
- Sukrut Oak@sukrut_oakFounder/CPO · LogosGuardF25B2B · San Francisco
- Cayden Liao@Cayden_LiaoFounder/CTO · Veria LabsF25B2B · San Francisco
FOUNDERROLEBATCHINDUSTRYLOCATIONTEAMX_url
Charles MuehlbergerConiferFounder/CTOSummer 2026B2BSan Francisco, United States4https://x.com/charles_v11Michael JeffordsConiferFounder/CEOSummer 2026B2BSan Francisco, United States4https://x.com/michaelbjeffEten ZouNebula SecurityFounder/CEOSummer 2026B2BSan Francisco, United States4https://x.com/etenal7Frank WuNebula SecurityFounderSummer 2026B2BSan Francisco, United States4https://x.com/FrankOverF1owXiaochuan YuNebula SecurityFounder/CTOSummer 2026B2BSan Francisco, United States4https://x.com/Nyaaaaa_ovoYuan TanNebula SecurityFounderSummer 2026B2BSan Francisco, United States4—Guy Ben AharonOneCLIFounder/CTOSummer 2026B2BSan Francisco, United States0https://x.com/GuyBenAharonJonathan FishnerOneCLIFounder/CEOSummer 2026B2BSan Francisco, United States0https://x.com/jonathanfishnerVarun WadhwaTraceforceFounder/CTOSummer 2026B2BSan Francisco, United States2—Xia HuaTraceforceFounder/CEOSummer 2026B2BSan Francisco, United States2—Dekai LiTridentFounder/CTOSummer 2026B2BSan Francisco, United States4https://x.com/li_dekaiiJunaid MahmoodTridentFounder/CEOSummer 2026B2BSan Francisco, United States4https://x.com/whosjunaiddDan DanayVerdict Machine2× YCFounder/CEOSummer 2026B2BTel Aviv, Israel4—Isaac GrossmanVerdict MachineFounderSummer 2026B2BTel Aviv, Israel4—Liran KoganVerdict MachineFounder/CPOSummer 2026B2BTel Aviv, Israel4—Pierre BetouinTolmo2× YCFounder/CEOSpring 2026B2BSan Francisco, United States12https://x.com/pbetouinVladimir de TurckheimTolmoFounderSpring 2026B2BSan Francisco, United States12https://x.com/poledesfetesAbel JohnLogosGuardFounder/CTOFall 2025B2BSan Francisco, United States2—Sukrut OakLogosGuardFounder/CPOFall 2025B2BSan Francisco, United States2https://x.com/sukrut_oakCayden LiaoVeria LabsFounder/CTOFall 2025B2BSan Francisco, United States3https://x.com/Cayden_Liao
Showing 1–20 of 166 founders
Xiaochuan Yu
Founder/CTO·Nebula Security
PRIMARY INFO
RoleFounder/CTO
Team size4
BatchSummer 2026
LocationSan Francisco, United States
Company statusActive
StageEarly
BIO
Founder at Nebula Security (YC S26). Hacked into iPhone, Chrome, Firefox, Safari, QEMU, and various things in your daily life. DEFCON finalist for 3 consecutive years. $200k+ Bug Bounty in Chrome. Core member of r3kapig, the #1 hacking team in the world in 2025, on CTFTime. M.S. from UC San Diego. Research published at USENIX Security, BlackHat USA. Ph.D. droped out.
Ex-company, school and discipline below are derived from this bio. Nothing is inferred when the bio is missing.
BACKGROUND
CredentialsPhD
DisciplineResearcherKeyword match from the bio text, not a classifier.
TRACK RECORD
First YC company on record
COMPANY CONTEXT
Nebula SecurityBuilding Mythos for everyone
