Y Combinator Startup Podcast This Startup Secretly Detects Fraud For Fortune 500s
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Mar 31, 2026 
Karine Mellata, Variance co-founder and former Apple fraud engineer, talks about building AI agents that quietly help Fortune 500s fight fraud, review content, and verify identities. She gets into why secrecy matters, how messy enterprise data becomes usable, how state-backed abuse rings are uncovered, and the near-fatal accident that almost stopped the company.
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How Variance Filters Fake GoFundMe Crises
- GoFundMe uses Variance agents to verify whether crisis fundraisers are legitimate before they go live.
- After Charlie Kirk's murder, fraudsters launched fake family fundraisers; the agents checked identity, account history, images, and bios against platform rules.
The Three Building Blocks Of Compliance Agents
- Karine Mellata reduces the agent stack to three parts: policy docs, tools, and data.
- She says access to the open web was the last missing piece because crucial abuse signals often live in unstructured public information.
Why Fraud Automation Starts With Data Plumbing
- The hardest engineering problem was collecting scattered customer data, not just modeling decisions.
- Variance sometimes spins up a browser and scrapes internal dashboards built for humans because key fraud evidence hides behind old UIs.