MongoDB Realm

Welcome to the MongoDB Realm documentation!

Feedback Appreciated

While using the documentation, please provide feedback with the feedback form on the bottom right of the page. If you have suggestions for the product itself, please share with us on the MongoDB Feedback Engine for Realm.

Build a complete Task Tracker app with multiple clients in our Create a Task Tracker App tutorial.

Ready to set up a serverless backend Realm app? Jump into Create a MongoDB Realm App to get started.

App Services

Android SDK for Kotlin and Java

iOS SDK for Swift and Objective-C

.NET SDK for C# / Xamarin

Node SDK for TypeScript and JavaScript

React Native SDK for TypeScript and JavaScript

Web SDK for TypeScript and JavaScript

MongoDB Realm has a free tier. All usage below the free tier thresholds in a given month is not billed, so you can get started with MongoDB Realm at no cost. To see how billing works in MongoDB Realm, see Billing.

You can find the deprecated MongoDB Stitch documentation at

MongoDB Realm uses Realm Database version 10 and above. The documentation for earlier versions of Realm Database can be found on at Realm documentation (legacy).

Legacy Realm, both self-hosted Realm Object Server and the Realm Cloud, is currently End of Life and will be shut down on November 1st 2021. See Realm Legacy Migration Guide for migration instructions.

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