Functions
Build apps faster with a serverless architecture
Accelerate your development with an event-driven, serverless compute experience. Scale on demand and pay only for the resources you consume.
Try it freeManage your apps instead of infrastructure
Focus on building great apps. Don’t worry about provisioning and maintaining servers, especially when your workload grows. Functions provides a fully managed compute platform with high reliability and security. With scale on demand, you get the resources you need—when you need them.
Develop your way
Create Functions in the language you choose, such as JavaScript, C#, and F#, and scripting options such as Python, PHP, Bash, Batch, and PowerShell. Write code in an easy-to-use web-based interface, or upload precompiled code built with your favorite development tool. Take advantage of continuous deployment to integrate with your DevOps pipeline and use monitoring tools to troubleshoot.
Bind into services
Build rich, serverless scenarios by capitalizing on a range of Azure and external services. Easily interact with Azure Cosmos DB, Storage, and more, and external services including Twilio, SendGrid, and others—by adding input/output bindings to Functions. Save costs with less code to maintain.
Customers executing serverless code with Azure Functions
What you can do with 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 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.
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.
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 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
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 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.
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