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Realtime application framework (Node.JS server)
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What is Socket.IO?

It enables real-time bidirectional event-based communication. It works on every platform, browser or device, focusing equally on reliability and speed.
Socket.IO is a tool in the Realtime Backend / API category of a tech stack.
Socket.IO is an open source tool with 51K GitHub stars and 9.3K GitHub forks. Here’s a link to Socket.IO's open source repository on GitHub

Who uses Socket.IO?

1199 companies reportedly use Socket.IO in their tech stacks, including Bepro Company, Alibaba Travels, and Patreon.

5225 developers on StackShare have stated that they use Socket.IO.

Socket.IO Integrations

React, Backbone.js, Angular 2, Flutter, and Gatsby are some of the popular tools that integrate with Socket.IO. Here's a list of all 12 tools that integrate with Socket.IO.
Public Decisions about Socket.IO

Here are some stack decisions, common use cases and reviews by companies and developers who chose Socket.IO in their tech stack.

We are starting to work on a web-based platform aiming to connect artists (clients) and professional freelancers (service providers). In-app, timeline-based, real-time communication between users (& storing it), file transfers, and push notifications are essential core features. We are considering using Node.js, ExpressJS, React, MongoDB stack with Socket.IO & Apollo, or maybe using Real-Time Database and functionalities of Firebase.

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Hello. So, I wanted to make a decision on whether to use WebRTC or Amazon Chime for a conference call (meeting). My plan is to build an app with features like video broadcasting, and the ability for all the participants to talk and chat. I have used Agora's web SDK for video broadcasting, and Socket.IO for chat features. As I read the comparison between Amazon Chime and WebRTC, it further intrigues me on what I should use given my scenario? Is there any way that so many related technologies could be a hindrance to the other? Any advice would be appreciated. Thanks. Ritwik Neema

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Socket.IO's Features

  • Real-time analytics - Push data to clients that gets represented as real-time counters, charts or logs.
  • Binary streaming - Starting in 1.0, it's possible to send any blob back and forth: image, audio, video.
  • Instant messaging and chat - Socket.IO's "Hello world" is a chat app in just a few lines of code.
  • Document collaboration - Allow users to concurrently edit a document and see each other's changes.

Socket.IO Alternatives & Comparisons

What are some alternatives to Socket.IO?
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.
SocketCluster is a fast, highly scalable HTTP + realtime server engine which lets you build multi-process realtime servers that make use of all CPU cores on a machine/instance. It removes the limitations of having to run your Node.js server as a single thread and makes your backend resilient by automatically recovering from worker crashes and aggregating errors into a central log.
PubNub makes it easy for you to add real-time capabilities to your apps, without worrying about the infrastructure. Build apps that allow your users to engage in real-time across mobile, browser, desktop and server.
Pusher is the category leader in delightful APIs for app developers building communication and collaboration features.
Express is a minimal and flexible node.js web application framework, providing a robust set of features for building single and multi-page, and hybrid web applications.
See all alternatives

Socket.IO's Followers
5033 developers follow Socket.IO to keep up with related blogs and decisions.