0.security (YC F26) — 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.
0.security is a Y Combinator company in the Fall 2026 batch. Its directory entry describes it as: The autonomous cybersecurity team. The founders listed are Doruk Tan Ozturk (Founder), Fabian Zbinden (Founder) (Y Combinator directory entry, October 27, 2026).
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Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
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.
0sec-labsorganisation linked from the company's own record
Find & fix security risks with frontier intelligence | 0.security
AI for your most demanding security work. Investigate vulnerabilities, test defenses, and verify fixes.
The title and description the site itself served, answering 200. Not a cached copy and not the company's directory entry — what was live when we asked.
Doruk Tan Ozturk
Founder
Co-founder @ 0.security
Chief Engineer, Cyber & Autonomous Systems @ FHNW Swiss Mars Rover Team.
Coding since 7, Swiss finalist @ math & logic games championship at age 14.
Swiss Startup 2026 Award winner
Founded Peak Twilight - largest Swiss lofi prod brand w/ 100M+ Streams from 180+ countries
Previously co-founded Soothe Studios (exited) - ETH Zürich & FHNW CS Dropout
Fabian Zbinden
Founder
Co-founder @ 0.security
Previously built in Fintech:
- Mellivora Capital, a regulated quant fund for institutional investors.
- Crypto Finance (sold to Deutsche Börse): early hire + youngest employee, helped scale from 10 to 100+ employees.
- BEEYOND Clothing: Founded one of Switzerland's most popular sustainable brands.
- 3x Winner Swiss Startup Challenge & Fashion Award from University of St. Gallen (HSG).
- Self-taught filmmaker & cinematographer
- 4x Olympic Trampoline Swiss Champion.
Founders, titles and bios as the company published them. Photographs are our own copies of the ones on that record, so they do not break when the original link expires.
No investor is drawn from a Form D — the form states how many invested and never who. The one investor on this graph is named because a batch has exactly one.
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What They Do, And How The Money Works
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