Serverless Computing - Azure Functions

In Serverless computing cloud provider provides backend as a service. The architecture is inherently scalable, can be deployed quickly. But comes with a cost such as testing and debugging. 

Azure Functions is the implementation in Azure. Azure functions can be integrated with Cosmos DB, Service bus and Storage.

Serverless APIs with Azure Function Proxies

Azure functions can be used to host an API. Not very often you host APIs in Functions. But this s a good way for scalability, costs or ease of implementation.

Cloud Messaging in Azure

You can enhance the behavior in Azure by using following

Event Grid

Fully managed event routing services by connecting serverless logic to events.

Service Bus

Messaging infrastructure in Azure.

Logic Apps

Helps you to provide workflows allowing developers to integrate data with their apps.

Analytics

Azure Stream Analytics allows you to query data in SQL like language

Serverless computing in AWS

Resources

https://azure.microsoft.com/en-us/services/functions/