MongoDB

MongoDB is the leading NoSQL document database, storing data as flexible JSON-like documents (BSON). It excels for applications with evolving schemas, hierarchical data, and horizontal scaling needs. Features include aggregation pipelines, full-text search, change streams, and Atlas cloud platform. MongoDB is widely used in startups and enterprises alike for content management, IoT, real-time analytics, and mobile backends. Its developer-friendly query language and flexible schema make rapid prototyping easy.