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

SignalDB is described as 'Client-side database with a MongoDB-like interface and TypeScript support. It allows easy data management, reactivity and persistence on the client side, with plans for future replication capabilities' and is an app in the backup & sync category. There are more than 10 alternatives to SignalDB for a variety of platforms, including Web-based, Self-Hosted, Mac, Windows and Linux apps. The best SignalDB alternative is Supabase, which is both free and Open Source. Other great apps like SignalDB are Firebase, Meteor, RxDB and GUN.
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...
RxDB (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...

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.

Convex is the open-source backend for application builders. An all-in-one platform with thoughtful, product-centric APIs.
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.
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.


PouchDB is an open-source JavaScript database inspired by Apache CouchDB that is designed to run well within the browser.
Unbody is an AI-native development stack, unifying AI and product development into one seamless toolchain. It empowers developers to build scalable AI-native products without dependencies or fragmented workflows.