Cloud Firestore is a NoSQL document database that lets you easily store, sync, and query data for your mobile and web apps – at global scale; MongoDB: The database for giant ideas. MongoDB stores data in JSON-like documents that can vary in structure, offering a dynamic, flexible schema.
Read moreCan you use MongoDB and Firebase together?
Firebase includes two data stores: the Real-Time Database and Cloud Firestore, each optimized for a different part of application development. … For example, MongoDB can be operated on-premise or in the cloud (using MongoDB Atlas, or self-managed cloud MongoDB), while Firebase is purely a cloud database service.
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