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MouseCat

YC W26

New York City, US · Founded 2026 · 6 employees · 2 known investors

MouseCat provides agentic AI infrastructure that automates fraud investigations and risk operations within customer cloud environments. The platform enables enterprises to scale investigation quality across all transactions while retaining full data control and ownership.

Also known as Agnostic

Founders & leadership· Y Combinator alumni (W26)

MouseCat was founded in 2026 by Nicholas Aldridge and Joseph McAllister.

NANicholas Aldridge
Nicholas Aldridgein𝕏Co-Founder & CEOHe previously served as Principal Engineer at AWS AI for 6.5 years, where he worked on Amazon Bedrock Knowledge Bases, Agents, and AgentCore, and participated on the A2A steering committee.
JMJoseph McAllister
Joseph McAllisterinCo-Founder & CTOPreviously, he spent four years at Coinbase working on risk decision systems, including streaming data pipelines and fraud detection models. He studied computer science at Cornell University and founded Roo Storage, acquired by Handled in 2020.

Investors · 2

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Competitors · 2

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Frequently asked questions

What does MouseCat do?
MouseCat provides agentic AI infrastructure that automates fraud investigations and risk operations within customer cloud environments. The platform enables enterprises to scale investigation quality across all transactions while retaining full data control and ownership.
Who founded MouseCat?
MouseCat was founded by Nicholas Aldridge, Joseph McAllister in 2026.
Who are MouseCat's investors?
MouseCat's investors include Y Combinator, Imagination Capital.
Where is MouseCat headquartered?
MouseCat is headquartered in New York City, US.