Realtime application framework (Node.JS server)

Hosted APIs to build realtime apps with less code

Global service for real-time and reliable messaging and streaming data

A new library for ASP.NET developers that makes developing real-time web functionality easy.

Build real-time apps quickly and scale them globally.

Lightweight publish-subscribe & distributed queueing messaging system

An open, scalable realtime engine for Node.js

A scalable server for realtime webapps

Simple pub/sub messaging for the web

A realtime, open-source JavaScript back end from RethinkDB

Self-hosted Firebase.

Distributed solution providing messaging and queuing for streaming data

Real time data synchronization platform for modern API driven web&mobile apps

Reverse proxy for realtime web services

a highly flexible real-time backend as a service.

Realtime messaging service

High level API and backend for writing web apps that use push messaging

Build realtime Ruby web applications

Open-source alternative to Firebase and Parse

Move data everywhere it's needed, instantly and automatically

Realtime APIs made simple

Efficiently Turn APIs into Real-time Experiences