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Casco (YC X25) — Autonomous security testing for web apps, APIs, cloud, and AI systems

Casco performs autonomous security testing for your web apps, APIs, infrastructure, and AI systems. Human supervision optionally available.

Casco is a Y Combinator company in the Spring 2025 batch. Its directory entry describes it as: Autonomous security testing for web apps, APIs, cloud, and AI systems. The founders listed are Rene Brandel (Founder/CEO), Ian Saultz (Founder/CTO) (Y Combinator directory entry, May 19, 2025).

6 more companies from YC Spring 2025 ↓

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Casco

New accelerator entry · 2025-05-19 · the record

Spring 2025
batch
10
people
Early
stage
Unspecified
region
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What the record says

BatchSpring 2025
Announced2025-05-19
StageEarly
StatusActive
Team size10
IndustryB2B
Sub-industryB2B -> Security
RegionsUnspecified
HiringYes
Sitehttps://casco.com
Founded2025
YC group partnerJon Xu
Previously known asTransmittr

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Also in YC Spring 2025

Same batch, B2B first.

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In their words

Casco performs autonomous security testing for your web apps, APIs, infrastructure, and AI systems. Human supervision optionally available. Use Casco for year-round security and get a penetration test report for your SOC2 and ISO27001 compliance certifications. Hack yourself at: https://casco.com --- We already secure software deployed in 60% of Fortune 500 companies and are default alive. [1] [1] http://www.paulgraham.com/aord.html

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What the Full Report on Casco covers

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  2. Which Company This Is

  3. What They Do, And How The Money Works

  4. Who Runs It, And How To Reach Them

  5. The Money: Funding, Valuation, Runway

  6. Who Pays Them, And Who They Are Up Against

  7. Warning Bells

  8. Sources

    1 cited source found

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Sourced from the company's Y Combinator directory entry.

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Casco: Accepted into Y Combinator Spring 2025
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Permanent URL: https://mentionfox.com/funding/yc-casco
Last updated 2026-10-29
Primary record: Y Combinator directory entry
Casco (YC X25) — Autonomous security testing for web apps, APIs, cloud, and AI systems. MentionFox, 2026-10-29. https://mentionfox.com/funding/yc-casco