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 PocketBase, TrailBase, Firebase and Socket.io.
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.
Scaledrone is a realtime messaging service and platform. Send live updates, create chatrooms and collaborative tools.
Real-time communication service for connecting online devices. Infrastructure and APIs for IoT, gaming, apps and real-time web.
JBoss is Red Hats Java EE 5-compliant (soon Java EE 6-compliant) application server. It is, as with Red Hat itself, dual-licensed either as open source (community edition) or commercially (enterprise edition).
The Jetty Web Server provides a HTTP server and Servlet container capable of serving static and dynamic contend either from a standalone or embedded instantiations.
Scalable pub/sub platform offers developers secure, low-latency, enterprise-grade realtime messaging, built-in features for GPS tracking, event updates, and automatic failover, delivering billions of messages daily to users across industries on a global edge network.
Great API and easy implementation
Robin lets you ship superior in-app messaging experience without having to do the tedious work. Building 1-1 / group messaging can get complex, we have done the hard work so you never have to.
MongooseIM is aimed at large, complex enterprise level projects, where real-time communication is critical for business success. It provides high availability, ease of deployment, development and reliability in production.
Simperium is a service for developers to move data everywhere it's needed, instantly and automatically.
MirrorFly is customizable in-app communication SDKs for businesses to integrate chat, voice, video calling and video conferencing features on their existing web and mobile applications.
With Stream’s chat react components, SDKs, and UI kits, product teams can unleash chat on web, or as a mobile app, with just a few lines of code. Maximize development bandwidth with Stream’s flexible backend messaging API and front-end components.
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Scaledrone is super easy to use. You can easily take an existing Pusher codebase and replace it with Scaledrone. You get more features, like client-side event publishing and message history AND it's cheaper.