# Casco

> Casco is a San Francisco cybersecurity startup that runs autonomous, AI-driven penetration tests on web apps, APIs, cloud infrastructure, and AI systems. Founded in 2025 by ex-AWS engineers Rene Brandel and Ian Saultz, it pairs continuous machine-driven attack simulation with human security experts, delivering compliance-ready reports for standards like SOC 2, ISO 27001, and the EU AI Act. A Y Combinator (X25) company, Casco says it serves 300+ companies and secures AI systems used across a majority of the Fortune 500.

- **Founded:** 2025
- **Headquarters:** San Francisco, California, United States
- **Founders:** Rene Brandel (Co-Founder & CEO), Ian Saultz (Co-Founder & CTO)
- **Team size:** ~12 employees
- **Products:** Autonomous Security Testing, Supervised Penetration Testing, AI Red-Teaming, Compliance Reporting, Free Tools
- **Notable:** Grew to 300+ reported customers within roughly a year of founding., Reported Series A at a $100M valuation led by Standard Capital., Says it secures AI systems deployed across a majority of the Fortune 500.

## Products & services

- **Autonomous Security Testing** — Continuous, AI-driven penetration testing across web apps, APIs, cloud infrastructure, and AI systems that runs year-round instead of once annually, with clear findings, business-impact context, and reproduction steps.
- **Supervised Penetration Testing** — Human-in-the-loop assessments where security experts validate and extend the AI's findings for high-stakes or compliance-driven engagements.
- **AI Red-Teaming** — Continuous simulation of sophisticated multi-step attacks against AI agents and applications to surface jailbreaks, misuse, and safety failures.
- **Compliance Reporting** — Audit-ready reports mapped to SOC 2, ISO 27001, NIST AI RMF, and EU AI Act requirements, generated from real test results.
- **Free Tools** — Public utilities including a CVSS Calculator and a Bug Bounty Calculator.

## Achievements

- Grew to 300+ reported customers within roughly a year of founding.
- Reported Series A at a $100M valuation led by Standard Capital.
- Says it secures AI systems deployed across a majority of the Fortune 500.
- Became a Gold Sponsor of OWASP.
- Selected for Y Combinator's X25 (Spring 2025) batch.

## Latest updates

- **2026-07** — Reported Series A funding round at a $100M valuation, led by Standard Capital with FundersClub, Y Combinator, and Rebel Fund.
- **2026** — Customer base cited as 300+ companies; expanded coverage across web, API, cloud, and AI systems.
- **2025** — Founded by ex-AWS engineers Rene Brandel and Ian Saultz; joined Y Combinator's X25 batch.

## Links

- Website: https://casco.com
- LinkedIn: http://www.linkedin.com/company/getcasco

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Profile page: https://yespress.io/casco-yc-x25
Published by YesPress — https://yespress.io
Last updated: 2026-07-31