Candidature YC de Fabraix

Summer 2026Active

San Francisco

Fabraix a été sélectionné par Y Combinator dans le cadre du batch Summer 2026 en tant qu'entreprise B2B. Ci-dessous : ce que fait l'entreprise, qui l'a fondée, et sa candidature à YC, reconstruite question par question dans le vrai formulaire YC.

Batch YC: Summer 2026
Secteur d'activité: B2BSecurity
Lieu: San Francisco
Taille de l'équipe: 2
Statut: Active
Lancé: 2026

Fondateurs

Ahmed AlyFounder/CEO
ibrahim abduFounder/CTO

Ce que fait Fabraix

Fabraix builds state-of-the-art AI red-teaming agents that continuously detect security vulnerabilities in customer-facing AI. Our product, Nyx, has already found vulnerabilities in agents at dozens of Fortune 500 companies. On AgentHarm, the leading benchmark for offensive AI security, Nyx achieved a 78% attack success rate, compared with 67% for GPT-5.6 Sol. AI agents can change more often than teams can test them. A new model, prompt, tool, permission, or data source can change what an agent does, even when the application code stays the same. And AI is also increasing how much software companies produce and how often it changes. We built Nyx to automate the work required to red-team AI agents. It is multi modal by design and interacts with the target indirectly through controlled replicas of SaaS products and websites that we maintain, placing malicious payloads in webpages, documents, files, messages, and tool outputs to test how an agent behaves under different conditions. Nyx often finds its first vulnerability within minutes or hours rather than days or weeks. Because the work is fully automated, companies can repeat the test with every change and at a much lower cost than what a 7-figure red-teaming (and point-in-time) engagement would require. We're also the team behind ACE (Adversarial Cost to Exploit), a benchmark that measures AI security in terms of how much it costs attackers to break an AI system; providing a game-theoretic framework to understand how motivated a rational attacker would be in exploiting the system.

Candidature YC de Fabraix, reconstruite

Candidature Y Combinator

Fabraix, promotion Summer 2026. Les vraies questions de candidature, répondues à partir de données publiques.

Founders2
Company7
Progress7
Idea4
Equity3
Curious2
Batch Preference1

Company

Company name

Fabraix

Describe what your company does in 50 characters or less.

AI agents that red-team other AI for security flaws.

What is your company going to make? Please describe your product and what it does or will do.

We're building Nyx, an AI agent that acts as an autonomous red-teamer to find vulnerabilities in customer-facing AI systems. It targets changes in models, prompts, tools, and data sources - areas that traditional security reviews can't keep up with. Nyx runs multimodal attacks by interacting through replicas of real SaaS products and web systems, planting payloads to test agent boundaries. The goal is to give companies a way to catch issues as fast as they ship changes, at a fraction of the cost of human red-teaming.

Where do you live now, and where would the company be based after YC?

San Francisco, CA, USA. We'll stay based here after YC.

Explain your decision regarding location.

San Francisco is where AI security buyers, technical partners, and talent are concentrated. Being here lets us move fast on product and sales.

21 réponses supplémentaires dans la candidature complète

se trouvent dans la version complète. Créez un compte gratuit pour l'ouvrir dans YC Insights, à côté de tous les autres batches YC.

Voir la candidature complète

Questions fréquemment posées

Est-ce la vraie candidature YC de Fabraix ?

Non. Y Combinator garde les candidatures soumises privées. Ceci est une reconstruction : les vraies questions du formulaire YC, répondues à partir des données publiques de Fabraix (notes de lancement, parcours des fondateurs, description du produit). Cela montre comment une entreprise comme Fabraix se présenterait à YC, pas le texte qu'ils ont soumis.

À quel batch YC Fabraix appartenait-il ?

Fabraix faisait partie du batch Summer 2026 de Y Combinator.

Qui a fondé Fabraix ?

Fabraix a été fondé par Ahmed Aly, ibrahim abdu.

Que fait Fabraix ?

The world's frontier hacker of AI agents.

Comment lire la candidature complète reconstruite ?

Créez un compte Round Funded gratuit. La version complète de la candidature de Fabraix en 26 réponses, et de chaque autre promotion YC, se trouve dans YC Insights.