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MouseCat
YC W26New York City, US · Founded 2026 · 6 employees · 3 known investors
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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
AI & Machine LearningEnterprise SoftwareFintechComplianceFraud DetectionUnited States of AmericaAmerica / Canada
Founders & leadership· Y Combinator alumni (W26)
MouseCat was founded in 2026 by Nicholas Aldridge and Joseph McAllister.
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Nicholas AldridgeCo-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.
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Joseph McAllisterCo-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 · 3
Y Combinator✓ confirmed by MouseCatSan Francisco · $500K
How we know: the Y Combinator directory · open dataset · 5k.vc investor directory · Not right? Tell us
Imagination Capitallisted by Imagination CapitalNew York · $100K – $150K
How we know: Y Combinator's founder network · Not right? Tell us
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corporate structureMouseCat, Inc.
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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, SurgePoint Angel.
- Where is MouseCat headquartered?
- MouseCat is headquartered in New York City, US.