MouseCat is a Y Combinator W26 company building an AI-powered fraud investigation platform that uses autonomous agents to conduct human-quality fraud investigations at scale. The platform continuously analyzes transactions, learns from past cases and analyst feedback, and identifies fraud rings while proposing mitigations. It is aimed at fraud and risk teams that need to scale investigation capacity. The company is based in New York City.
MouseCat
ActiveAI-powered fraud investigations
Total raised
$500K
1 round
Stage
Seed
Jan 2026
Team
1-10
since 2026
Pricing
—
Founded
2026
New York, United States
Agent-ready
—
Autonomous AI agents that run fraud investigations at scale
Continuous analysis of transactions
Learning from past cases and analyst feedback
Identification of fraud rings and coordinated activity
Proposal of mitigations for detected fraud
Human-quality investigation workflow automation
Built for fraud and risk teams that need to scale capacity
12/100
Early
MCP server
Public API
Webhooks
OAuth 2.0
SDKs
No public agent surfaces detected yet.
Jan 2026 Seed $500K ● Y Combinator
Capital network
$500K raised ·1 backer·10 network links
- Backers1
- Shared portfoliocompanies these backers also fund
- Extended networkfunds that co-invest alongside them
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- What does MouseCat do?
- It uses autonomous AI agents to run human-quality fraud investigations at scale, analyzing transactions, identifying fraud rings, and proposing mitigations.
- Does it learn over time?
- Yes, it learns from past cases and analyst feedback to improve its investigations.
- Can it detect organized fraud?
- It is designed to identify fraud rings and coordinated activity, not just individual suspicious transactions.
- Who is MouseCat for?
- Fraud and risk teams that need to scale their investigation capacity while maintaining investigation quality.
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