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Casco

YC X25

Founded 2025 · 10 employees · Hiring · 11 known investors

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Casco provides autonomous security testing that continuously scans code for vulnerabilities, replacing traditional once-yearly penetration testing. The platform targets fast-growing companies and enterprises seeking faster, high-quality security assessments without false positives.

Also known as Transmittr, Inc. · Transmittr

CybersecurityEnterprise Software

Founders & leadership· Y Combinator alumni (X25)

Casco was founded in 2025 by Rene Brandel and Ian Saultz.

RBRene Brandel
Rene BrandelFounder & CEOFounder and CEO of Casco, a platform that provides automated security scanning to identify code vulnerabilities.
ISIan Saultz
Ian SaultzFounder & CTOIan Saultz is the founder and CTO of Casco.
PS
Prakul SinghRecruiter

Investors · 11

Maiora Rebel Ventureslisted by Maiora Rebel Ventures
Rebel Fundlisted by Rebel FundSan Francisco · $100K – $5M

How we know: Y Combinator's founder network · rebelfund.vc · Not right? Tell us

Standard Capitallisted by Standard CapitalSan Francisco

How we know: Standard Capital's portfolio page · a partner's Signal profile · Y Combinator's founder network · Not right? Tell us

Y Combinatorlisted by Y CombinatorSan Francisco · $500K

How we know: the Y Combinator directory · open dataset · 5k.vc investor directory · Not right? Tell us

Batch Venturesreported

How we know: Y Combinator's founder network · Not right? Tell us

Blast.Clubreported$5.5M

How we know: Y Combinator's founder network · Not right? Tell us

Liquid VenturesreportedSan Francisco · $250K – $5M

How we know: Y Combinator's founder network · Not right? Tell us

Metsu Capitalreported

How we know: Y Combinator's founder network · Not right? Tell us

PioneerreportedToronto, Ontario

How we know: Y Combinator's founder network · open dataset · 5k.vc investor directory · Not right? Tell us

Twenty Two VenturesreportedPalo Alto · $50K – $250K

How we know: Y Combinator's founder network · Not right? Tell us

Images

Casco photo

Related companies · 3

CiscoCisco Systems designs and sells networking hardware, software, and services—including routers, switches, and cloud-based applications—to enterprise, service provider, and consumer markets globally.
HackerOneHackerOne operates a platform for coordinating cybersecurity vulnerability disclosures and bug bounty programs. The company connects security researchers with organizations to identify and remediate security vulnerabilities.
QodexQodex is an autonomous AI agent that reviews code changes and runs API, UI, and security tests against a company's live application, turning filed bugs into runnable scenarios. It targets software engineering and QA teams, posting findings and status checks on pull requests using standard Playwright and HTTP scenarios that customers own.

Companies working in the same space as Casco.

Legal entities · 1

corporate structure
Transmittr, Inc.

In the news

Casco - Agentic Red Teaming for AI agents and appsycombinator.com · May 2025

Frequently asked questions

What does Casco do?
Casco provides autonomous security testing that continuously scans code for vulnerabilities, replacing traditional once-yearly penetration testing. The platform targets fast-growing companies and enterprises seeking faster, high-quality security assessments without false positives.
Who founded Casco?
Casco was founded by Rene Brandel, Ian Saultz in 2025.
Who are Casco's investors?
Casco's investors include FundersClub, Maiora Rebel Ventures, Rebel Fund, Standard Capital, Y Combinator, Batch Ventures, Blast.Club, Liquid Ventures and 3 more.