Azure Functions

Process events with a serverless code architecture

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

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Don't worry about the infrastructure and provisioning of servers, especially when your Functions call rate is scaled up.

Accelerate development

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

Bind into services

Easily click and add bindings to Azure services and external services (Box, DropBox, OneDrive, SendGrid etc.) to get input into or output from Functions.

Create Azure Functions in a variety of languages

Develop your way

Create Functions in a variety of 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 favourite development tool.

Integrate DevOps

Quickly and easily iterate on Azure Functions with continuous deployment using Visual Studio Team Services, GitHub, or BitBucket. Plus, 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 when your code is running. You’ll be charged based on the number of resources Azure Functions needs, and only for as long as it takes for your code to execute.

Built for business

Use Azure Functions when events occur 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, you could execute code that runs every 15 minutes and cleans 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, you could execute serverless code that reads newly discovered test log files in an Azure Blob Storage container and transforms 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, when a file is saved in OneDrive, this triggers a function that uses the Microsoft Graph API to modify the spreadsheet, creating 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, saving user data and deciding what data to display. Or, you can do simple customisations, 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 just a set of HTTP APIs that are called from a mobile client using the WebHook URL. For example, a mobile application could capture an image, 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, 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

Azure Functions can be used to customise the behaviour of a bot using a WebHook. For example, you can create an Azure Function that processes a message using Cortana Analytics and call this function using Bot Framework.

Real-time bot messaging in Azure Functions

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