Instant is for building real-time and offline-enabled applications. We make it easy to build collaborative products like Notion or Figma.
Cost / License
- Freemium
- Open Source (Apache-2.0)
Platforms
- Online
- Software as a Service (SaaS)
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 Sockudo.
Instant is for building real-time and offline-enabled applications. We make it easy to build collaborative products like Notion or Figma.
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.

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.




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.
Real-time communication service for connecting online devices. Infrastructure and APIs for IoT, gaming, apps and real-time web.

Simperium is a service for developers to move data everywhere it's needed, instantly and automatically.
Scalable & Fast API for building social networks, activity feeds, news feeds and activity streams. Aggregated feeds, ranked feeds, analytics and personalization all help you improve your app's engagement, retention and conversion.


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.



