Azure Functions

Process events with a serverless code architecture

An event-based serverless compute experience to accelerate your development. Scale based on demand and pay only for the resources you consume.

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Azure Functions is a serverless event-driven experience


Don’t worry about the infrastructure and provisioning servers, especially when your Functions call rate scales up.

Accelerate development

Write your code in the Functions editor and click run for immediate execution.

Bind into services

Click and add bindings to Azure services and external services (Box, Dropbox, Microsoft OneDrive, SendGrid, and more) to get input into or output from Functions.

Create Azure Functions in a variety of languages

Develop your way

Create Functions in several languages, including JavaScript, C#, F#, as well as scripting options such as Python, PHP, Bash, Batch, and PowerShell—and do it all in an easy-to-use web-based interface. Or upload and trigger pre-compiled code built with your favorite development tool.

Integrate DevOps

Quickly iterate on Azure Functions with continuous deployment using Visual Studio Team Services, GitHub, or Bitbucket. Use the embedded logging environment to monitor and troubleshoot.

Integrate DevOps and a serverless architecture
Pay only for the Azure Functions you use

Pay only for what you use

Pay only for the time your code is running. You’re charged based on the number of resources Azure Functions needs, and only for as long as it takes your code to execute.

Built for business

Use Azure Functions when events happen in internal APIs or business systems, and deliver results directly to your on-premises databases or business solutions.

Serverless Architecture

Common scenarios for Azure Functions

Timer-based processing

Azure Functions supports an event based on a timer using Cron job syntax. For example, execute code that runs every 15 minutes and clean up a database table based on custom business logic.

Azure Functions timer based processing

Azure service event processing

Azure Functions supports triggering an event based on an activity in an Azure service. For example, execute serverless code that reads newly discovered test log files in an Azure Blob storage container, and transform this into a row in an Azure SQL Database table.

C# Azure Function for reacting to Azure Insights Events

Azure Functions event processing

SaaS event processing

Azure Functions supports triggers based on activity in a SaaS service. For example, save a file in OneDrive, which triggers a function that uses the Microsoft Graph API to modify the spreadsheet, and creates additional charts and calculated data.

SaaS event processing and serverless code functions

Serverless web application architectures

Azure Functions can power a single-page app. The app calls functions using the WebHook URL, saves user data, and decides what data to display. Or, do simple customizations, such as changing ad targeting by calling a function and passing it user profile information.

Serverless architecture in Azure Functions

Serverless mobile back ends

A mobile back end can be a set of HTTP APIs that are called from a mobile client using the WebHook URL. For example, a mobile application can capture an image, and then call an Azure Function to get an access token for uploading to blob storage. A second Azure Function is triggered by the blob upload and resizes the image to be mobile-friendly.

Node.js Azure Function for generating SAS tokens C# Azure Function for generating SAS tokens

Serverless mobile back ends

Real-time stream processing

For example, Internet of Things (IoT) devices send messages to Azure Stream Analytics, which then calls an Azure Function to transform the message. This function processes the data and creates a new record in an Azure SQL database.

Real time stream processing

Real-time bot messaging

Use Azure Functions to customize the behavior of a bot using a WebHook. For example, create an Azure Function that processes a message using Cortana Analytics and call this function using Microsoft Bot Framework.

Real time bot messaging in Azure Functions

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