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

Pusher is described as 'Hosted API for quickly, easily and securely adding scalable realtime functionality to web and mobile apps' and is an app in the development category. There are more than 25 alternatives to Pusher for a variety of platforms, including Mac, Linux, Web-based, Windows and Self-Hosted apps. The best Pusher alternative is Supabase, which is both free and Open Source. Other great apps like Pusher are TrailBase, PocketBase, Firebase and Socket.io.
The open source Firebase alternative. Supabase adds realtime and restful APIs to Postgres without a single line of code.

TrailBase offers a blazingly fast, open-source application server featuring type-safe APIs and real-time data. Built on Rust, with JS/ES6/TS runtime, it provides built-in authentication, admin UI, and low-latency responses. Supports mobile, web, and desktop, eliminating the need for dedicated caches.





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.




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.

A lightweight and versatile open source server that simplifies the application stack by natively executing application code across eight different programming language runtimes.
Instant is for building real-time and offline-enabled applications. We make it easy to build collaborative products like Notion or Figma.
Ridiculously simple data sharing for the Internet of Things.
It's like X for social machines. If your product, device, machine, gadget or thing can connect to the Internet, it can use dweet.io to easily publish and subscribe to data. .

CometChat is a Facebook style footer chat written in PHP and mySql for your website which enables your users to interact and chat with each other in real-time.

deepstream.io is a clusterable realtime server that handles persistent tcp and websocket connections. It offers data-sync, pub/sub and request/response. It's available for Linux, Mac and Windows and comes with clients in JS, Java and many others.
socket.io is a javascript framework, not java