Firestore is a non-SQL database that provides an easy store, querying, and syncing. Mongo DB uses JSON-like documents, while Firestore has no SQL document. MongoDB is open-source, while Firestore is not open-source. Query performance is quicker compared to Firebase.17 Ara 2020
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Both Realtime Database and Cloud Firestore are NoSQL Databases . Stores data as one large JSON tree. Simple data is very easy to store.
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