Azure Web PubSub Service

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Welcome to the Web PubSub Service!

Use the service to build your REAL-TIME messaging applications using WebSocket APIs and the publish-subscribe pattern.

  • Connect to the service using WebSocket API from web pages, mobile apps, edge devices, etc
  • Allows up to 100K concurrent connections
  • Provide powerful APIs for you to manage these clients and deliver real-time messages


Clients directly use WebSocket APIs to connect and send messages.

var simpleClient = new WebSocket("wss://");

var subprotocolClient = new WebSocket("wss://", "");


A wide variety of programming languages with WebSocket APIs are supported to build the cross platform clients

C# JavaScript Java Python

✔ Mobile Apps ✔ Edge devices


Publish messages to subscribed clients in real-time.