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Casco

Hiring

Casco is a YC Spring 2025 (P25) company. Team of 8.

About Casco

GPAgent's own fund-neutral profile, written from public information. Updated Oct 5, 2026.

Summary

Casco builds an AI penetration testing platform for software teams shipping web apps, APIs, cloud infrastructure, and AI agents. It continuously runs simulated attacks against a company's full attack surface, proves exploitable vulnerabilities, and retests every fix, replacing the slow, point-in-time engagements of traditional human pentesters.

Go-to-market

Enterprise and government security teams are the buyers, reached through direct sales and events; teams get started by booking a demo and running Casco against their live attack surface.

From the Y Combinator listing

How Casco describes itself in Y Combinator's public directory. Original listing (opens in a new tab)

Autonomous security testing for AI systems

Casco helps companies confidently ship AI agents and apps by simulating attacks on their AI systems, identifying vulnerabilities, and providing guided remediation. Companies building on AI face a disproportionate amount of cybersecurity threats. 73% of enterprises experienced at least one AI-related security incident in the past 12 months, with the average incident cost amounting to $4.8m. It also takes 40% longer for these companies to identify and address these breaches vs. non-AI related incidents. Check if your AI system is secure at casco.com --- We already secure AI systems deployed in 60% of Fortune 500 companies and are default alive. [1] [1] http://www.paulgraham.com/aord.html

Facts

Industry
B2B / B2B -> Security
Team size
8
Status
Active
Stage
Early

Founders (2)

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