Nebula Security YC Application
San Francisco
Nebula Security went through Y Combinator in the Summer 2026 batch as a B2B company. Below: what the company does, who founded it, and its application to YC, reconstructed question by question in the real YC form.
- YC batch
- Summer 2026
- Industry
- B2BSecurity
- Location
- San Francisco
- Team size
- 4
- Status
- Active
- Launched
- 2026
Founders
Eten ZouFounder/CEO
Yuan TanFounder
Frank WuFounder/Security Research Lead
Xiaochuan YuFounder/CTO
What Nebula Security does
Nebula Security 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 Nebula Security” 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.
Nebula Security's YC application, reconstructed
Y Combinator application
Nebula Security, Summer 2026 batch. The real form questions, answered from public data.
- Founders2
- Company7
- Progress7
- Idea4
- Equity3
- Curious2
- Batch Preference1
Company
Nebula Security
Autonomous AI defense system for cyber attack
We're building an autonomous AI-driven defense platform for enterprises. Nebula Security detects and responds to live cyber attacks, automatically identifying novel exploits and weaknesses. Our system is built by the world's #1 hacking team, and 'Audited by Nebula Security' is rapidly becoming a credibility signal for organizations serious about security.
San Francisco, CA, USA; Remote. After YC, we remain based in San Francisco with remote team members.
Security companies win by attracting the best global researchers, so we are remote-friendly to bring in top talent, but anchored in San Francisco to be close to customers and partners.
21 more answers in the full application
Founders, Progress, Idea, Equity, Curious, Batch Preference are in the full version. Create a free account to open it in YC Insights, next to every other YC batch.
Frequently Asked Questions
Is this the real Nebula Security YC application?
No. Y Combinator keeps submitted applications private. This is a reconstruction: the real YC form questions, answered from Nebula Security's public data (launch notes, founder backgrounds, product description). It shows how a company like Nebula Security would present itself to YC, not the text they submitted.
What YC batch was Nebula Security in?
Nebula Security was part of the Y Combinator Summer 2026 batch.
Who founded Nebula Security?
Nebula Security was founded by Eten Zou, Yuan Tan, Frank Wu, Xiaochuan Yu.
What does Nebula Security do?
Autonomous AI defense system for cyber attack
How do I read the full reconstructed application?
Create a free Round Funded account. The full 26-answer version of Nebula Security's application, and every other YC batch, is in YC Insights.
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