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Azure
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Azure Functions

Execute event-driven serverless code with an end-to-end development experience
Design serverless apps in the language of your choice while focusing on business logic.
Try Azure for free Create a pay-as-you-go account
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Overview

Build and deploy serverless apps at scale

  • Use the language of your choice to connect functions to Azure services with triggers and bindings.
  • Utilize the built-in serverless elasticity with enterprise grade networking, to instantaneously scale your app from zero to wherever your needs take you, and back.
  • Opt for the hosting plan that works for your scenario, with a pay-per-use model.
  • Maximize the potential of the Azure data and AI platform to develop your serverless apps with built-in DevOps tools, streamlining the development, deployment, and management lifecycle.
Use cases

Apply serverless functions to a variety of use cases

Explore more scenarios

Intelligent apps

Develop RAG apps, chatbots, and text completion, with generative AI, and other models or frameworks.
Learn more

Real-time processing

Process your files, data, and event streams in near real-time.
 
Learn more

Workflow orchestration

Simplify complex orchestration needs with built-in fault tolerance using Durable Functions, including long-running functions.
Learn more
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Built-in security and compliance 

Microsoft has committed to investing USD$20 billion in cybersecurity over five years.
We employ more than 8,500 security and threat intelligence experts across 77 countries.
Azure has one of the largest compliance certification portfolios in the industry.
Learn more about security on Azure
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Pricing

Flexible pricing options to fit your needs

  • Flex consumption plan (preview): Get fast elastic scale with private networking, always-ready instances, and high concurrency control.
  • Azure App Service plan: Run Functions on the App Service plan for long-running or predictive operations.
  • Azure Container Apps plan: Use Functions with the Container Apps plans for multi-type microservices, consistent network, observability, and billing configuration.
  • Premium plan: Scale on demand, run on powerful instances, and connect to virtual networks.
Learn more about Azure Functions pricing
RELATED PRODUCTS

Azure products work better together

Use Azure Functions with other Azure products to build advanced and comprehensive solutions.
Serverless containers

Azure Container Apps

Deploy modern apps and microservices using serverless containers.
Learn more
Managed Kubernetes

Azure Kubernetes Service (AKS)

Deploy and scale containers on managed Kubernetes.
Learn more
Generative AI

Azure OpenAI Service

Connect your own data, call functions, and improve workflow with language and image models.
Learn more
Platform as a service

 Azure App Service

Quickly and easily create powerful cloud apps for web and mobile.
Learn more
AI developer tool

GitHub Copilot

Suggest code and entire functions in real time, right from your editor, powered by Azure OpenAI Service.
Learn more
Back to Related products section
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Learning journey

Build intelligent serverless apps

Develop adaptive, responsive, and personalized experiences by building and modernizing apps with Azure.
Start learning
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CUSTOMER STORIES

See how customers are innovating with Azure Functions

  1. Gluwa logo
  2. Mr. Turing logo.
  3. BrainStorm logo
  4. Deutsche Borse Group logo
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Gluwa logo
“Azure, unlike other clouds, doesn’t force isolation. So, that matches with blockchain, where not everything has to be behind private networks. That works perfectly for us, because blockchain is public.”
David Lebee, Chief Software Architect, Gluwa
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“When customers send us documents, we need to process them fast. Azure Functions and Azure Kubernetes Service both deliver great scalability, enabling us to process many documents in parallel to keep our customers happy—without paying for spare capacity when we don’t need it.”
Vinícius Oliveira, Research and Development Lead, Mr. Turing
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BrainStorm logo
By moving to a service-oriented architecture based on Azure Kubernetes Service (AKS) and Azure Functions, BrainStorm achieved faster development, better functionality, stability, flexible costs, and scalability to deliver a better user experience.
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Deutsche Borse Group logo
“Thanks to the rich ecosystem of Azure services, we could start innovating right away. Post-trading processes and their infrastructure must be fast, high-performance, scalable, and able to support straightforward data exchange, while also offering a high level of security and protection for our sensitive data. Azure does all this for us.”
Michael Girg: Chief Cloud Office, Deutsche Börse
Back to CUSTOMER STORIES section
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Resources

Learn how to get started

  1.
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Learn how to build intelligent apps

Read the documentation
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Azure Functions for developers

Read the documentation
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Discover new learning paths

Read the documentation
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Learn how to create serverless applications

Read the documentation
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Get started with Azure Functions

Read the documentation
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Frequently asked questions

  • Functions provides varying levels of support for languages including C#, JavaScript, F#, Java, and Python.
     
    See Supported languages in Azure Functions for details. 
  • Functions apps on Consumption plans and App Service plans will run or be available 99.95% of the time.
     
    See the full SLA for Functions.
  • Functions can run on the Flex Consumption plan, Azure App Service plan, Premium plan, or Azure Container Apps plan.
     
    See Azure Functions scale and hosting plans for details.
  • Avoid hard-coding access to other services like Azure Blog storage and Azure Cosmos DB using triggers and bindings. Triggers are what cause a function to run, and bindings are declarations that connect the function to another resource.
     
    See triggers and bindings Functions supports for details. 
  • Create and test functions on your local machine using your favorite code editor and development tools. Connect local functions to live Azure services and debug them on your local computer using the full Functions runtime. The requirements for developing functions on your local computer depend on the programming languages and tools you prefer.
     
    See local development environments for more
  • Running Functions on Container Apps is a good fit for multitype microservices architecture in a centralized environment. This gives you consistent network, observability, and billing configurations.