In a bid to provide financial services to underserved consumers in Nigeria, QuickCheck, a fast-growing Fintech startup, leverages artificial intelligence and ClickHouse, a column-oriented database, to offer app-based neo-banking products. The company has seen significant success with its mobile app, which has been downloaded by over 2 million people and processed over 4.5 million micro-credit applications. QuickCheck uses ClickHouse for various use cases, including financial data analysis, fraud analysis, and monitoring data, with more than 50 people using dashboards powered by ClickHouse for their daily tasks. The database's performance has been a key factor in the company's decision to migrate its data from Postgres, allowing it to process large amounts of data quickly and efficiently. With ClickHouse's instant query results and column compression feature, QuickCheck is able to create dashboards that were previously impossible to generate due to slow processing times in Postgres. The company's experience with ClickHouse has been overwhelmingly positive, with its team citing the database's performance as "magical" and a key factor in their success.