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The perfect Database for JavaScript applications

  • Realtime Queries
  • Realtime Replication
  • Works Offline
  • Supports all major JavaScript runtimes
  • Great Performance
  • Easy to learn

Realtime applications made easy

From the results of a query, to a single field of a document, with RxDB you can observe everything. This enables you to build realtime applications fast and reliable. Whenever your data changes, your UI reflects the new state.

Write await collection.upsert({
  id: 'foobar',
  color: '#e6008d'

Observe await collection.findOne('foobar')
 .$ // get observable
 .subscribe(d => {
   screen.backgroundColor = d.color;

Replicate with your existing infrastructure

RxDB supports replication with a CouchDB server or any custom GraphQL endpoint which smoothly integrates with your existing infrastructure. Also you can use the replication primitives plugin to create custom replications over any protocol like REST, Websocket, p2p or Firestore.


Online is optional

RxDB follows the Offline First paradigm where an application must work as well offline as it does online. This is done by persisting data on the client side and replicating it in the background. RxDB can even be used solely on the client side, with no backend at all.

  • Your application still works offline
  • Increases perceived performance
  • Easier and faster implementation
  • Needs less backend resources and scales better
angular Angular
capacitor Capacitor
cordova Cordova
Node.js Node.js
React React
Svelte Svelte

Flexible storage layer

RxDB is based on a storage interface that enables you to swap out the underlying storage engine. This increases code reuse because the same database code can be used in any JavaScript runtime by just switching out the storage settings.

Trusted and open source

github star
Github Stars
npm downloads
npm downloads
Projects build with RxDB
Twitter followers

Pricing Models

RxDB Basics

Free & Open Source
  • Basic RxStorages
  • Realtime Replication
  • Live Queries
  • Schema Validation
  • Multi-Tab Support
  • Encryption
  • Compression
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Book a one hour consulting session with the RxDB maintainer. I will answer all your questions, give proposals for your use case and we can even do a pair programming session if you have a specific problem in your source code.
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