What is the difference between MongoDB and MongoDB Realm?

To connect to MongoDB Realm over the wire protocol, you must construct a MongoDB connection string that includes credentials for an application user and an application-specific appName query parameter . You must URL encode connection strings before you can use them to connect to MongoDB Realm.

MongoDB belongs to “Databases” category of the tech stack, while Realm can be primarily classified under “Mobile Database” . “Document-oriented storage” is the primary reason why developers consider MongoDB over the competitors, whereas “Good” was stated as the key factor in picking Realm.

MongoDB Realm is free to use below the following monthly free tier thresholds: 1,000,000 requests or 500 hours of compute or 10,000 hours of sync runtime (whichever occurs first) 10GB of data transfer.

MongoDB Realm provides a first-class service interface for MongoDB Atlas that enables secure querying of one or more Atlas data sources. The MongoDB service secures your data with a dynamic, role-based Rules engine that proxies and modifies incoming queries based on rules that you define. …