Sendbird vs Socket.IO

	Sendbird	Socket.IO
Time to "hello world" Reviewed by 3+ independent developers Ratings were given based on the average amount of time it takes to sign up to a new account and publish the first message.	4 / 5 5 = <30 min 4 = 30 min - 1 h 3 = 1-2 h 2 = 2-4 h 1 = 4+ h View code example	4 / 5 5 = <30 min 4 = 30 min - 1 h 3 = 1-2 h 2 = 2-4 h 1 = 4+ h View code example
Demos / Tutorials A selection of online demos and tutorials so you can test and see the code in action. Explore Ably's tutorials for our pub/sub messaging platform	Developer Portal Getting Started Build a JavaScript chat app with Sendbird UIKit React Native Chat Tutorial #1 - Build a chat app using Sendbird More Sendbird demos & tutorials	Getting started with Socket.IO Whiteboard demo Build a realtime database with Socket.IO and MongoDB
Documentation Reviewed by 3+ independent developers Explore Ably's documentation for our pub/sub messaging platform	4.33 / 5 Getting started guides / 5 Information architecture and developer journey / 5 API reference documentation / 5 Readability, design and navigation / 5 Quality of code / 5 Breadth and quality of tutorials / 5 The documentation is comprehensive, detailed, and clear, with sample projects. It's easily navigable, and the written and video tutorials are in-depth, but there could be more of them. The different products that make up the Sendbird platform are clearly separated (e.g. Chat, Calls, UIKit, etc) before introducing the SDKs and API. This gives users an overview of the products before diving into its documentation. Each product has API reference documentation. The key functionalities of that product are listed out for easy access. Generally, in terms of comprehensiveness, readability, navigation, ease of use, and code quality, the documentation is very solid.	4 / 5 Getting started guides / 5 Information architecture and developer journey / 5 API reference documentation / 5 Readability, design and navigation / 5 Quality of code / 5 Breadth and quality of tutorials / 5 "Much like the solution, the documentation is pretty lightweight. You have an excellent getting started guide that requires no prior Socket.IO or Node.js knowledge. There are tens of code snippets throughout the docs, which is fantastic. There are almost no tutorials (not official ones), but you do have a chat and a whiteboard demo that you can grab from GitHub. The quality of writing is good enough. Most of the time, things are clear. Navigating between documentation, demos, and the API reference is quite annoying. They could have done a better job linking these sections and having them displayed in a common ToC. Although lightweight and generally clear, the documentation seems to have some holes in it, based on the number of GitHub and Stack Overflow questions about Socket.IO."
Dashboard or dev console Reviewed by 3+ independent developers Sign up for free and explore Ably's pub/sub messaging platform	5 / 5 Ease of use / 5 Stats and reports / 5 Functionality / 5 The dashboard allows you to create and manage applications. It also enables you to see all the stats and reports you need about monthly and daily active users, and peak concurrent connections. It also enables you to create and manage chat channels and make calls, making it easy to test. It has a slick design and is quite intuitive to use, and it’s divided into five features; overview, users, settings, calls, chat. It also has moderation tools that you can use to protect your conversations directly from your dashboard.	1 / 5 Ease of use / 5 Stats and reports / 5 Functionality / 5 "Socket.IO does not provide a developer console or dashboard."
SDKs Note: Only official SDKs were taken into account. Explore Ably's 25+ SDKs for our pub/sub messaging platform	5 SDKs Including: Android iOS JavaScript	1 official Socket.IO server implementation (Node.js), and 4 official client implementations (JavaScript, Java, C++, Swift) Note that there are also several community-made server and client implementations in other languages, such as Python, .NET, and Golang.
API structure Reviewed by 3+ independent developers	5 / 5 API consistency across SDKs / 5 Well structured / 5 Intuitive / 5 Simple / 5 The API is pretty straightforward, consistent across SDKs, it’s also intuitive and easy to use provided you read the documentation. I found it easy to figure out what to do without a lot of help. I find the methods simple, easy to remember and easy to understand.	5 / 5 API consistency across SDKs / 5 Well structured / 5 Intuitive / 5 Simple / 5 "Socket.IO has a simple JavaScript-based API interface that has intuitive naming conventions. The API reference documentation is very detailed, with each resource described in detail, and with numerous code examples throughout. It’s easy to get started with both the Server and the Client APIs."

Sendbird

Socket.IO

Getting started and developer experience

Time to "hello world"

Reviewed by 3+ independent developers

Ratings were given based on the average amount of time it takes to sign up to a new account and publish the first message.

4 / 5

5 = <30 min
4 = 30 min - 1 h
3 = 1-2 h
2 = 2-4 h
1 = 4+ h

View code example

4 / 5

5 = <30 min
4 = 30 min - 1 h
3 = 1-2 h
2 = 2-4 h
1 = 4+ h

View code example

Demos / Tutorials

A selection of online demos and tutorials so you can test and see the code in action.

Explore Ably's tutorials for our pub/sub messaging platform

Developer Portal Getting Started Build a JavaScript chat app with Sendbird UIKit

React Native Chat Tutorial #1 - Build a chat app using Sendbird

More Sendbird demos & tutorials

Documentation

Reviewed by 3+ independent developers

Explore Ably's documentation for our pub/sub messaging platform

4.33 / 5

Getting started guides / 5

Information architecture and developer journey / 5

API reference documentation / 5

Readability, design and navigation / 5

Quality of code / 5

Breadth and quality of tutorials / 5

The documentation is comprehensive, detailed, and clear, with sample projects. It's easily navigable, and the written and video tutorials are in-depth, but there could be more of them. The different products that make up the Sendbird platform are clearly separated (e.g. Chat, Calls, UIKit, etc) before introducing the SDKs and API. This gives users an overview of the products before diving into its documentation. Each product has API reference documentation. The key functionalities of that product are listed out for easy access. Generally, in terms of comprehensiveness, readability, navigation, ease of use, and code quality, the documentation is very solid.

4 / 5

Getting started guides / 5

Information architecture and developer journey / 5

API reference documentation / 5

Readability, design and navigation / 5

Quality of code / 5

Breadth and quality of tutorials / 5

"Much like the solution, the documentation is pretty lightweight. You have an excellent getting started guide that requires no prior Socket.IO or Node.js knowledge. There are tens of code snippets throughout the docs, which is fantastic. There are almost no tutorials (not official ones), but you do have a chat and a whiteboard demo that you can grab from GitHub. The quality of writing is good enough. Most of the time, things are clear. Navigating between documentation, demos, and the API reference is quite annoying. They could have done a better job linking these sections and having them displayed in a common ToC. Although lightweight and generally clear, the documentation seems to have some holes in it, based on the number of GitHub and Stack Overflow questions about Socket.IO."

Dashboard or dev console

Reviewed by 3+ independent developers

5 / 5

Ease of use / 5

Stats and reports / 5

Functionality / 5

The dashboard allows you to create and manage applications. It also enables you to see all the stats and reports you need about monthly and daily active users, and peak concurrent connections. It also enables you to create and manage chat channels and make calls, making it easy to test. It has a slick design and is quite intuitive to use, and it’s divided into five features; overview, users, settings, calls, chat. It also has moderation tools that you can use to protect your conversations directly from your dashboard.

1 / 5

Ease of use / 5

Stats and reports / 5

Functionality / 5

"Socket.IO does not provide a developer console or dashboard."

SDKs

Note: Only official SDKs were taken into account.

Explore Ably's 25+ SDKs for our pub/sub messaging platform

5 SDKs

Including:

Android
iOS
JavaScript

1 official Socket.IO server implementation (Node.js), and 4 official client implementations (JavaScript, Java, C++, Swift)

Note that there are also several community-made server and client implementations in other languages, such as Python, .NET, and Golang.

API structure

Reviewed by 3+ independent developers

5 / 5

API consistency across SDKs / 5

Well structured / 5

Intuitive / 5

Simple / 5

The API is pretty straightforward, consistent across SDKs, it’s also intuitive and easy to use provided you read the documentation. I found it easy to figure out what to do without a lot of help. I find the methods simple, easy to remember and easy to understand.

5 / 5

API consistency across SDKs / 5

Well structured / 5

Intuitive / 5

Simple / 5

"Socket.IO has a simple JavaScript-based API interface that has intuitive naming conventions. The API reference documentation is very detailed, with each resource described in detail, and with numerous code examples throughout. It’s easy to get started with both the Server and the Client APIs."

Sendbird	Socket.IO
const SendBird = require('sendbird'); // Initialize SendBird instance to use APIs in your app. var sb = new SendBird({appId: APP_ID}); // Connect to user sb.connect(USER_ID, function(user, error) { if (error) { console.log(error); } console.log(user) // The user is connected to Sendbird server. }); sb.OpenChannel.createChannel(function(openChannel, error) { if (error) { console.log(error); } // An open channel is successfully created. openChannel.enter(function(response, error) { if (error) { console.log(error); } // The current user successfully enters the open channel and can chat with other users in the channel by using APIs. openChannel.sendUserMessage('hello-world', null, null, function(message, error) { if (err) { console.log(err); } console.log('message', message); // The message is successfully sent to the channel. }); }); }); // Receive message var channelHandler = new sb.ChannelHandler(); channelHandler.onMessageReceived = function(channel, message) { // message received };	var app = require('express')(); var http = require('http').Server(app); var io = require('socket.io')(http); app.get('/', function(req, res) { res.sendfile('index.html'); }); //Broadcasting events var clients = 0; io.on('connection', function(socket) { clients++; io.sockets.emit('broadcast',{ description: clients + ' clients connected!'}); socket.on('disconnect', function () { clients--; io.sockets.emit('broadcast',{ description: clients + ' clients connected!'}); }); }); http.listen(3000, function() { console.log('listening on localhost:3000'); }); //Handling broadcast events on the client side <!DOCTYPE html> <html> <head> <title>Hello world</title> </head> <script src = "/socket.io/socket.io.js"></script> <script> var socket = io(); socket.on('broadcast',function(data) { document.body.innerHTML = ''; document.write(data.description); }); </script> <body>Hello world</body> </html>

Sendbird

Socket.IO

"Hello world" code example

const SendBird = require('sendbird');
// Initialize SendBird instance to use APIs in your app.
var sb = new SendBird({appId: APP_ID});


// Connect to user
sb.connect(USER_ID, function(user, error) {
if (error) {
console.log(error);
}
console.log(user)
// The user is connected to Sendbird server.      
});


sb.OpenChannel.createChannel(function(openChannel, error) {
if (error) {
console.log(error);
}
// An open channel is successfully created.
    openChannel.enter(function(response, error) {
if (error) {
console.log(error);    
}


// The current user successfully enters the open channel and can chat with other users in the channel by using APIs.
        openChannel.sendUserMessage('hello-world', null, null, function(message, error) {
if (err) {
console.log(err);    
}
            console.log('message', message);
// The message is successfully sent to the channel.
        });
    });
}); 


// Receive message
var channelHandler = new sb.ChannelHandler();


channelHandler.onMessageReceived = function(channel, message) {
    // message received
};

var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);

app.get('/', function(req, res) {
   res.sendfile('index.html');
});

//Broadcasting events
var clients = 0;
io.on('connection', function(socket) {
   clients++;
   io.sockets.emit('broadcast',{ description: clients + ' clients connected!'});
   socket.on('disconnect', function () {
      clients--;
      io.sockets.emit('broadcast',{ description: clients + ' clients connected!'});
   });
});

http.listen(3000, function() {
   console.log('listening on localhost:3000');
});

//Handling broadcast events on the client side
<!DOCTYPE html>
<html>
   <head>
      <title>Hello world</title>
   </head>
   <script src = "/socket.io/socket.io.js"></script>
   <script>
      var socket = io();
      socket.on('broadcast',function(data) {
         document.body.innerHTML = '';
         document.write(data.description);
      });
   </script>
   <body>Hello world</body>
</html>

	Sendbird	Socket.IO
Realtime features
Pub/Sub messaging Pub/Sub is a design pattern that lets any number of publishers (producers) push messages to channels (also known as topics). Multiple subscribers (consumers) can subscribe to a channel to consume published messages. Explore Ably's pub/sub messaging implementation		Limited You can use the rooms feature to broadcast events to a subset of clients, but this applies exclusively to the server-side (i.e. clients don’t have access to the list of rooms it has joined). You can also use a Redis adapter to broadcast events to clients through the Redis pub/sub mechanism.
Message queues A message queue is a form of asynchronous service-to-service communication. Messages are stored on a queue until they are processed. Note that each message is only consumed by one subscriber (consumer). Explore Ably's message queues implementation
Presence Presence enables you to track the online and offline status of devices and end-users in real time and to store their state. Essential for chat apps and multiplayer games. Explore Ably's presence implementation	Limited Presence is only available for Sendbird Chat, but it's not supported by other products like Sendbird Desk and Sendbird Calls.
Message history Message history provides a means to retrieve previously published messages. For this to be possible, message data must be stored (persisted) somewhere. Explore Ably's message history implementation
Connection state recovery (stream resume) In the case of unreliable network conditions, clients may suddenly disconnect.Connection state recovery ensures that when they reconnect, the data stream resumes exactly where it left off. Explore Ably' s connection state recovery implementation
Guaranteed message ordering Ordering ensures that messages are delivered to consumers in the same order that producers publish them. Explore Ably' s guaranteed message ordering implementation
Exactly-once semantics Exactly-once is a system-wide data integrity guarantee that ensures each message is delivered to consumers exactly-once. Explore Ably' s idempotent publishing implementation
Message delta compression Message delta compression enables you to only send the changes from the previous message to subscribers each time there’s an update, instead of the entire message. Useful for use cases where there is a significant degree of similarity between successive messages. Explore Ably' s message delta compression implementation
Native push notifications Native push notifications can be used to deliver messages even when clients are offline. Useful for geolocation updates or news alerts. Explore Ably's push notifications implementation
Webhooks Webhooks provide a mechanism to get messages and other types of events (such as clients entering or leaving channels) pushed to your servers over HTTP. Explore Ably's webhooks implementation
Serverless functions A serverless function is essentially an isolated, single-purpose piece of code that is only executed when it’ triggered by an event. For example, you can use serverless functions to send a welcome message to clients when they become present on chat channels. Note that serverless functions are usually fully managed by cloud vendors. Explore Ably's serverless functions implementation
Built-in integrations Which popular services & systems are Sendbird and Socket.IO integrated with? Explore Ably's library of integrations	Webhooks Custom IFTTT Zapier Serverless functions AWS Lambda Cloudflare Workers Google Cloud Functions Microsoft Azure Functions Streaming Apache Kafka Apache Pulsar Amazon Kinesis Amazon SQS RabbitMQ AMQP	Webhooks Custom IFTTT Zapier Serverless functions AWS Lambda Cloudflare Workers Google Cloud Functions Microsoft Azure Functions Streaming Apache Kafka Apache Pulsar Amazon Kinesis Amazon SQS RabbitMQ AMQP
Known limits and constraints Find out practical limits, such as the maximum message size, or the maximum number of concurrent connections. Explore the practical limits of the Ably pub/sub messaging platform	Publisher throughput Unknown Maximum message size Unknown Maximum number of topics Unknown Maximum number of connections Unknown	Throughput Unknown Maximum message size Unknown, but the default is 1 MB Maximum number of topics N/A Maximum number of concurrent connections Unknown

Supported development platforms, languages, open protocols and cloud models
Development platforms & operating systems Which popular development platforms and operating systems do Sendbird and Socket.IO support via official SDKs? Explore the development platforms supported by Ably	Android Java / JVM iOS macOS iPadOS tvOS watchOS Mono .NET	Android Java / JVM iOS macOS iPadOS tvOS watchOS Mono .NET
Languages Which popular programming languages do Sendbird and Socket.IO support via offical SDKs? Explore the programming languages supported by Ably	JavaScript Node.js TypeScript Java Objective-C Swift Go PHP Python Ruby Flutter Clojure Scala	JavaScript Node.js TypeScript Java Objective-C Swift Go PHP Python Ruby Flutter Clojure Scala
Open protocols Which popular open protocols do Sendbird and Socket.IO support? Explore the open protocols supported by Ably	WebSocket HTTP AMQP MQTT STOMP SSE Webhooks	WebSocket HTTP AMQP MQTT STOMP SSE Webhooks
Cloud models Which popular cloud models do Sendbird and Socket.IO support?	Self-hosted Cloud-managed Serverless Globally-distributed	Self-hosted Cloud-managed Serverless Globally-distributed

Global and reliable edge service
Edge messaging network with latency-based routing Latency-based routing ensures that clients are always routed to the nearest datacenter and point of presence. Explore Ably's routing mechanism that mitigates network and DNS issues		N/A
Multi-region data replication (message durability) Multi-region data replication (storage) protects against single points of failure and ensures message data durability. Learn how Ably ensures message durability		N/A
Uptime SLAs Here’s what the most common SLAs amount to in terms of downtime over a calendar year: 99.999% SLA = 5m 15s downtime per year 99.99% SLA = 52m 35s downtime per year 99.95% SLA = 4h 22m 58s downtime per year 99.9% SLA = 8h 45m 56s downtime per year 99% SLA = 3d 15h 39m 29s downtime per year Source: https://uptime.is/	Unknown	N/A
Quality of Service What QoS guarantees do Sendbird and Socket.IO provide natively? Explore Ably's availability and uptime guarantees for our pub/sub messaging platform	Multi-region data replication (storage) Exactly-once semantics Guaranteed message ordering Connection state recovery (stream resume)	Multi-region data replication (storage) Exactly-once semantics Guaranteed message ordering Connection state recovery (stream resume)

Security
API key authentication The simplest way to authenticate. Involves using private API keys that you can usually create and edit via a dashboard. Recommended to be used server-side, as private API keys shouldn’t be shared with untrusted parties. Explore Ably's implementation of API key authentication		N/A
Token-based authentication Which popular token-based authentication mechanisms do Sendbird and Socket.IO support? Note that token-based authentication is usually the recommended strategy on the client-side as it provides more fine-grained access control and limits the risk of credentials being compromised. Explore Ably's implementation of token-based authentication	Ephemeral tokens JWTs	Ephemeral tokens JWTs
Configurable rules and permissions Which types of configurable rules and permissions do Sendbird and Socket.IO support? Explore Ably's configurable rules and permissions	API keys rules and permissions Operation rules and permissions Admin rights	API keys rules and permissions Operation rules and permissions Admin rights
Message encryption Which types of message encryption do Sendbird and Socket.IO support? Explore Ably's message encryption mechanisms	Encrypted at rest Encrypted in transit Message payload encryption	Encrypted at rest Encrypted in transit Message payload encryption
Formal certifications Which formal certifications are Sendbird and Socket.IO compliant with? Explore Ably's security and compliance for our pub/sub messaging platform	SOC 2 TYPE I SOC 2 Type II HIPAA EU GDPR	SOC 2 TYPE I SOC 2 Type II HIPAA EU GDPR

Pricing & Support
Free package What do the free packages offered by Sendbird and Socket.IO consist of? Explore Ably's free package for our pub/sub messaging platform	No free package	Socket.IO is a free & open-source solution.
Pricing model How are the Sendbird and Socket.IO pricing models calculated? Explore Ably's pricing model for our pub/sub messaging platform	Pricing is divided into two categories: Sendbird Chat and Sendbird Calls. Sendbird Chat is $399/month	N/A
Enterprise package What benefits do the Sendbird and Socket.IO enterprise packages offer? Explore Ably's enterprise package for our pub/sub messaging platform	Sendbird offers a Premium Support package called Sendbird Desk. You’ll need to fill out a form to get started.	N/A
Community Reviewed by 3+ independent developers Explore Ably's community support channel for our pub/sub messaging platform	3 / 5 Presence on multiple channels / 5 Size and activity / 5 Sendbird has tiny but growing community presence on a few channels such as StackOverflow (less active) and their website (more active), with a fair number of users and engagement (but a small number of tutorials). Stackoverflow has some answered questions.	5 / 5 Presence on multiple channels / 5 Size and activity / 5 "Socket.IO is the most popular open-source WebSocket solution. It has a large and very active community. Client SDKs in several different languages? All of them community-made. Troubleshooting and support questions? The community will sort you out, almost always. As you’d expect, Stack Overflow and GitHub are very busy, with tens of thousands of questions, views, and responses about all things Socket.IO."
Support What types of support options and response times do Sendbird and Socket.IO offer? Explore Ably's support options for our pub/sub messaging platform	General support options Email, support ticket, technical documentation, community support (e.g. forums or Stack Overflow). Enterprise support Sendbird offers an enterprise package, which includes 24/7 phone, email, and chat access via Slack (with extra payment), access to customer success manager and quarterly business review Response time < 24 hours for general guidance queries < 3 hours for key functionality impaired in production(only applies to L1, L2 and L3).	General support options Technical documentation, Slack, Stack Overflow, GitHub. Enterprise support N/A Response time N/A

Pricing & Support

Free package

What do the free packages offered by Sendbird and Socket.IO consist of?

Explore Ably's free package for our pub/sub messaging platform

No free package

Socket.IO is a free & open-source solution.

Pricing model

How are the Sendbird and Socket.IO pricing models calculated?

Explore Ably's pricing model for our pub/sub messaging platform

Pricing is divided into two categories: Sendbird Chat and Sendbird Calls.

Sendbird Chat is $399/month

N/A

Enterprise package

What benefits do the Sendbird and Socket.IO enterprise packages offer?

Explore Ably's enterprise package for our pub/sub messaging platform

Sendbird offers a Premium Support package called Sendbird Desk.

You’ll need to fill out a form to get started.

N/A

Community

Reviewed by 3+ independent developers

Explore Ably's community support channel for our pub/sub messaging platform

3 / 5

Presence on multiple channels / 5

Size and activity / 5

Sendbird has tiny but growing community presence on a few channels such as StackOverflow (less active) and their website (more active), with a fair number of users and engagement (but a small number of tutorials). Stackoverflow has some answered questions.

5 / 5

Presence on multiple channels / 5

Size and activity / 5

"Socket.IO is the most popular open-source WebSocket solution. It has a large and very active community. Client SDKs in several different languages? All of them community-made. Troubleshooting and support questions? The community will sort you out, almost always. As you’d expect, Stack Overflow and GitHub are very busy, with tens of thousands of questions, views, and responses about all things Socket.IO."

Support

What types of support options and response times do Sendbird and Socket.IO offer?

Explore Ably's support options for our pub/sub messaging platform

General support options

Email, support ticket, technical documentation, community support (e.g. forums or Stack Overflow).

Enterprise support

Sendbird offers an enterprise package, which includes 24/7 phone, email, and chat access via Slack (with extra payment), access to customer success manager and quarterly business review

Response time

< 24 hours for general guidance queries

< 3 hours for key functionality impaired in production(only applies to L1, L2 and L3).

General support options

Technical documentation, Slack, Stack Overflow, GitHub.

Enterprise support

N/A

Response time

N/A

Disclaimer: The information presented for Sendbird was last updated on 28 February 2021 and on 3 December 2020 for Socket.IO. It is possible that some details may now be out of date. If you think that’s the case, please let us know so we can update them. In any case, you should not rely solely on the information presented here and must check with each provider before deciding to integrate or buy any of these two solutions.

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