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YC List Summer 2026

YC S26 · Active

NebuSec

Autonomous AI defense system for cyber attack

Class
Summer 2026
Status
Active
Industry
B2B
Location
San Francisco, CA, USA; Remote
Team size
4

Website

https://nebusec.ai

About

NebuSec is founded by the world’s #1 hacking team. We were the first team to build an nginx RCE and the first to root Android 17. Our co-founders include members of the world’s No. 1 CTF team, DEF CON winners, Black Hat speakers, and PhD in cybersecurity. We have won $400K in bug bounties by exploiting the Linux kernel and Chrome browser. “Audited by NebuSec” is a mark of serious security credibility: a signal to customers, investors, and partners that your product has been reviewed by the world’s best hackers.