Nubank
"The Neobank that Ate Brazil"
While legacy banks drowned in paperwork, Nubank built proprietary ML models for credit analysis and fraud detection — crunching thousands of data points in milliseconds. The lion's share of customer service runs through frictionless automated workflows and smart chatbots (their "Xpeer" system).
Scaled to nearly 100 million customers across Latin America with a fraction of the headcount of traditional banks. Their Customer Acquisition Cost is so low it practically breaks traditional financial modeling.