For security reasons, I prefer MongoDB Atlas. It supports role-based access control, so you have an entity for each individual.
MongoDB Atlas offers high scalability and flexibility with its schemaless architecture, efficiently managing large datasets while supporting various applications. It integrates smoothly with existing systems through robust API options, adding to its cost-effectiveness for organizations seeking reliability. However, challenges exist in data import/export, indexing efficiency, and query performance. Pricing is seen as expensive, with technical support and integration capabilities requiring enhancement, particularly in service integration and migration support.