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High level API and backend for writing web apps that use push messaging
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What is Radar?

Radar is built on top of engine.io, the next-generation backend for socket.io. It uses Redis for backend storage, though the assumption is that this is only for storing currently active data.
Radar is a tool in the Realtime Backend / API category of a tech stack.
Radar is an open source tool with 213 GitHub stars and 36 GitHub forks. Here’s a link to Radar's open source repository on GitHub

Who uses Radar?

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Radar's Features

  • More than just pub/sub: a resource-based API for presence, messaging and push notifications via a Javascript client library
  • Written in Javascript/Node.js, and uses engine.io (the new, low-level complement to socket.io)
  • Backend to multiple front-facing servers
  • REST API for working with web apps that don't use Node (presently, rework in progress)

Radar Alternatives & Comparisons

What are some alternatives to Radar?
Firebase is a cloud service designed to power real-time, collaborative applications. Simply add the Firebase library to your application to gain access to a shared data structure; any changes you make to that data are automatically synchronized with the Firebase cloud and with other clients within milliseconds.
It enables real-time bidirectional event-based communication. It works on every platform, browser or device, focusing equally on reliability and speed.
Pusher is the category leader in delightful APIs for app developers building communication and collaboration features.
Google Cloud Pub/Sub
Cloud Pub/Sub is a fully-managed real-time messaging service that allows you to send and receive messages between independent applications. You can leverage Cloud Pub/Sub’s flexibility to decouple systems and components hosted on Google Cloud Platform or elsewhere on the Internet.
SignalR allows bi-directional communication between server and client. Servers can now push content to connected clients instantly as it becomes available. SignalR supports Web Sockets, and falls back to other compatible techniques for older browsers. SignalR includes APIs for connection management (for instance, connect and disconnect events), grouping connections, and authorization.
See all alternatives

Radar's Followers
9 developers follow Radar to keep up with related blogs and decisions.
José Mora
Ranko Stanivuković
Vladimir Aznauryan
Manoel Pinto de Oliveira
Carlos Columna
Piyush Mohanty