Azure Web PubSub

Azure Web PubSub is a service available from Microsoft's Azure suite of apps and services, that offers real-time messaging for web applications using WebSockets and the publish-subscribe pattern. With it, users can develop web applications with real-time messaging using Azure Web PubSub, a managed service that supports native and serverless WebSockets. The user can create loosely coupled, scalable applications—including chats, live broadcasting, and IoT dashboards—with the publish-subscribe messaging pattern. Users can focus on functionality while Web PubSub manages the flow of data and content to webpages and mobile applications.

It features and supports:

• Real-time publish-subscribe messaging for web application development through native and serverless WebSocket support
• Built-in support for large-scale client connections and highly available architectures
  
• Support for a wide variety of client SDKs and programming languages
  

The service enables users to add real-time messaging and communication functionality to an application without the need to provision and maintain WebSocket servers. As a fully managed service, Azure Web PubSub handles hosting, scalability, load balancing, and other tasks.

Azure Web PubSub is available under free and standard tiers. The service is free for 20 current connections per unit (1 maximum unit) and for 20,000 messages per day.