Case Study: One of Europe’s Largest Retail Banks achieves realistic, privacy-safe test data and faster development with Mostly AI

Largest Retail Banks in Europe - Customer Case Study

Largest Retail Banks in Europe built a mobile banking app that required realistic transaction data for extensive testing, but strict privacy policies forced heavy masking and dummy data that lacked the necessary granularity. Mostly AI provided its synthetic data platform — a synthetic data generator delivered via REST API and a smart test-data dashboard — to create realistic, parameterized synthetic customers for high-fidelity testing.

Mostly AI trained its algorithm on raw client data to generate unlimited high-dimensional synthetic users and let testers create edge-case customers by setting parameters like account count, income range, and location. The result: product developers could not distinguish synthetic from real customers, test-data availability became near-instant (shortening development sprints by several days), and the bank safely shared granular anonymous data with partners to enable features such as account-balance prediction and new services like bill splitting.