The open source Firebase alternative. Supabase adds realtime and restful APIs to Postgres without a single line of code.

RxDB is described as '(short for Reactive Database) is a NoSQL-database for JavaScript Applications like Websites, hybrid Apps, Electron-Apps and NodeJs. Reactive means that you can not only query the current state, but subscribe to all state-changes like the result of a query or even a single' and is an app in the development category. There are more than 25 alternatives to RxDB for a variety of platforms, including Self-Hosted, Web-based, Mac, Windows and Linux apps. The best RxDB alternative is Supabase, which is both free and Open Source. Other great apps like RxDB are Firebase, Meteor, SignalDB and FerretDB.
The open source Firebase alternative. Supabase adds realtime and restful APIs to Postgres without a single line of code.

Firebase, provided by Google, is a backend service and application development platform. It uses AI, cloud infrastructure, and cross-platform SDKs for efficient app development. Firebase offers tools and infrastructure for app creation and business growth.


Meteor is a set of new technologies for building top-quality web apps in a fraction of the time. It is built around Smart Packages: little bundles of code that can run on a client, inside a cloud service, or both, and that can manage their lifetime inside the modern distributed...
FerretDB (formerly MangoDB) is an open-source proxy, which converts MongoDB wire protocol queries to SQL, and uses PostgreSQL as a database engine.
GUN is an open source, realtime, graph database written entirely in JavaScript and built using peer-to-peer algorithms, making it surprisingly fault tolerant and easy to get started with.

Couchbase is the NoSQL database market share leader, with production deployments at AOL, Deutsche Post, NTT Docomo, Salesforce.com, Turner Broadcasting Systems, Zynga and hundreds of other organizations worldwide.
Realm enables any development team, no matter the size, to include difficult-to-build features like two-way data sync and realtime collaboration. Devote more time to what makes your app truly unique and less time to maintaining services.
Iroh is a protocol for syncing & moving bytes. Bytes of any size, on any device. At its core, it's a peer-2-peer network built on a magic socket that establishes QUIC connections between peers. Peers request and provide blobs of opaque bytes that are incrementally...



Instant is for building real-time and offline-enabled applications. We make it easy to build collaborative products like Notion or Figma.
Feathers is a real-time, micro-service web framework for NodeJS that gives you control over your data via RESTful resources, sockets and flexible plug-ins.