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Xiaochuan Yu
FounderVP of Vulnerability Research at NebuSec
La Jolla Shores, California, United States
FoundedNebuSec · YC
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About
Xiaochuan Yu founded Nebula Security and previously participated in competitive hacking, including DEFCON competitions and CTF events. They hold an M.S. from UC San Diego and have published security research at USENIX Security and BlackHat.
VP of Vulnerability Research at NebuSecYC S26
Intro paths
Xiaochuan went through Y Combinator (Summer 2026) — any YC alum in your network can reach them through the YC community.
Their group partner at YC was Ankit Gupta, General Partner at Y Combinator — the partner who ran NebuSec's batch and knows the company first-hand. YC profile ↗
In turn, Xiaochuan can intro founders to NebuSec's investors below.
NebuSec's investors · 17
Frequently asked questions
- Who is Xiaochuan Yu?
- Xiaochuan Yu founded Nebula Security and previously participated in competitive hacking, including DEFCON competitions and CTF events. They hold an M.S. from UC San Diego and have published security research at USENIX Security and BlackHat.
- Where does Xiaochuan Yu work?
- Xiaochuan Yu is VP of Vulnerability Research of NebuSec.
- What companies did Xiaochuan Yu found?
- Xiaochuan Yu founded NebuSec.
Founder mafias
Y Combinator mafia10,594
Also came through, then founded or led a company.
UC San Diego mafia312
Also came through, then founded or led a company.
Sun Yat-sen University mafia9
Also came through, then founded or led a company.
About this profile. Compiled from public sources — NebuSec's own website and public professional profiles — and summarised by Fundraising Fox; every fact is kept with where it came from. Spotted an error, or would rather not be listed? Email privacy@fundraisingfox.com · How we build profiles · Your rights