Firestore and Firebase Realtime Database (RTDB) are both NoSQL databases by Google, but they differ in several ways. Firestore offers more advanced querying capabilities compared to RTDB. It allows for compound queries without needing to denormalize data. Firestore also has a better scalability as it can handle larger amounts of data and more connections than RTDB. In terms of data model, Firestore organizes data into collections and documents allowing hierarchical data structures, while RTDB stores data as one large JSON tree which is less structured. Firestore supports transactions across multiple documents with automatic batch operations, unlike RTDB where transaction support is limited. Lastly, Firestore’s pricing is based on the number of reads, writes, and deletes, whereas RTDB charges based on the amount of data stored and downloaded.
