0.security
0.security is a YC Fall 2026 (F26) company. Based in San Francisco, CA, USA. Team of 2.
About 0.security
Summary
0.security builds an autonomous AI system that continuously finds and fixes security vulnerabilities for developers, AI-native startups, and enterprises, replacing manual penetration testing and periodic security audits. It surfaces exploit chains, prioritizes issues by business impact, and delivers validated remediation, covering work that traditional tools and human security teams handle on a slower, shallower cycle. Its research has produced fixes for critical CVEs in the Linux kernel, widely used open-source packages, and software running across government and commercial infrastructure.
Business model
A free tier plus paid enterprise plans, with pricing listed on the website.
Go-to-market
Security teams and engineers at enterprises, financial services firms, pharma companies, and defense organizations buy it; developers can start for free via self-serve, with enterprise accounts handled through a dedicated sales motion.
From the Y Combinator listing
The autonomous cybersecurity team
0.security is an applied AI research lab helping developers, AI-native startups, growing teams, and enterprises to continuously find & fix security risks 24/7. Our autonomous cybersecurity team has found & fixed previously unknown vulnerabilities in operating systems, government code and software powering more than 3 billion devices. We work with EY, big pharma, financial services, AI-native startups and defense organisations to secure systems at the pace & depth needed to defend against AI-powered attackers.
Facts
- B2B / B2B -> Security
- San Francisco, CA, USA
- 2
- Active
- Early
Founders (2)
- Doruk Tan Ozturk
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