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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 50.4K GitHub stars and 9.2K GitHub forks. Here鈥檚 a link to Socket.IO's open source repository on GitHub

Who uses Socket.IO?

1184 companies reportedly use Socket.IO in their tech stacks, including Bepro Company, Alibaba Travels, and Barogo.

4706 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.

Full-stack web developer at Capmo GmbH | 10 upvotes 路 288.5K views
Shared insights

I use Socket.IO because the application has 2 frontend clients, which need to communicate in real-time. The backend-server handles the communication between these two clients via websockets. is very easy to set up in Node.js and ExpressJS.

In the research project, the 1st client shows panoramic videos in a so called cave system (it is the VR setup of our research lab, which consists of three big screens, which are specially arranged, so the user experience the videos more immersive), the 2nd client controls the videos/locations of the 1st client.

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Max Musing
Max Musing
Founder & CEO at BaseDash | 10 upvotes 路 14.3K views

Socket.IO is great for building real-time systems like chat. It's effectively a nice wrapper around WebSockets, with the ability to fallback to other methods for browsers that don't support it. We just used it to implement real-time collaboration at BaseDash, including a chat system like you're looking to build.

Node.js is probably the correct choice, especially if you're already familiar with it You'll probably still need to build an API to send requests to your server, and then use Socket.IO to push messages to your clients. This will let you authenticate users and store messages on your database so you can retrieve them later. PostgreSQL and MongoDB are good options for your database, you should be fine either way. Don't worry about speed, they'll both be sufficient.

React on the front end makes it really simple to handle real-time updating data. Again, even better since you're already familiar.

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I have always been interested in building a real-time multiplayer game engine that could be massively scalable, and recently I decided to start working on a MMO version of the classic "snake" game. I wanted the entire #Stack to be based on ES6 JavaScript so for the #Backend I chose to use FeathersJS with MongoDB for game/user data storage, Redis for distributed mutex and pub/sub, and Socket.IO for real-time communication. For the #Frontend I used React with Redux.js, the FeathersJS client as well as HTML5 canvas to render the view.

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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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Michael Mota
Michael Mota
Founder at AlterEstate | 7 upvotes 路 29.6K views

I honestly don't know if this could help but, I'll speak from my similar experience with Django. I had to do for a client a dynamic map in real time so that users can select their seats for a specific event. In the first MVP tickets sold in less then 10 minutes, over 400 users at the same time online trying to buy the seats. (I mention this to get in the context of why I used it).

We achieved this with Django, Socket.IO, PostgreSQL and for the frontend React. With the power of Socket IO we manage to achieve a real time connection with the database with a reaaally low response time.

The drawbacks of Django are that everyone knows that Django is not really good for real-time activities but in combination with Socket.IO this can be achieve really good.

I hope that in some way I helped. 馃憤馃徏

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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
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