Serverless compute for event-driven applications on Azure
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204 reviews trackedThe Bottom Line
Entry price
Paid plans only
Biggest pro
Serverless functions
Biggest con
Cold starts
TL;DR - Azure Functions
- Azure Functions is Microsoft's serverless compute service for event-driven applications
- It runs code in response to triggers without managing infrastructure
- Free tier with 1M executions/month, then pay per execution
Pricing: Paid only
Best for: Enterprises & pros
4.4/5 across review platforms
What is Azure Functions?
Azure Functions runs your code in response to events without managing servers. HTTP requests, timer schedules, queue messages, database changes-define what triggers your function, and Azure handles the rest.
Write functions in C#, JavaScript, Python, or Java. Pay only when code executes. Scaling happens automatically based on demand.
Teams building on Azure use Functions for glue code, webhooks, and event processing where spinning up full services would be overkill.
Available on: Web
Pros & Cons
Pros
- Serverless functions
- Multiple language support
- Good Azure integration
- Consumption-based pricing
- Durable functions
Cons
- Cold starts
- Vendor lock-in
- Debugging complex
- Execution limits
- Local development tricky
Ratings Across the Web
4.4(204 reviews)
Ratings aggregated from independent review platforms. Learn more
Key Features
Serverless computeEvent-drivenMultiple languagesTriggersBindingsAzure
Pricing Plans
Free TrialFree Tier
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Usage-based pricing
- 1M executions/month
- 400,000 GB-seconds
- Consumption plan
- All features
Most Popular
Consumption
$0.2/per 1M executions
Pay-as-you-go
- $0.000016/GB-sec
- Auto-scaling
- Pay for usage only
- Cold starts possible
Flex Consumption
$0.4/per 1M executions
GA 2025
- Faster cold starts
- VNet integration
- Higher concurrency
- Always-ready option
Premium
Varies
Pre-warmed
- No cold starts
- VNET connectivity
- Unlimited execution
- Dedicated instances
How Azure Functions's pricing compares
At $0.4/mo, Azure Functions is the most affordable of its 3 direct competitors.
Entry paid plan, monthly.
Reviews
4.4/5
Across 204 verified user reviews on G2
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Azure Functions FAQ
Is Azure Functions free?
Generous free tier: 1 million executions and 400,000 GB-s per month. Consumption plan charges only for usage. Many apps run free.
What is Azure Functions?
Azure Functions is Microsoft's serverless compute platform. Run code triggered by events without managing servers. Similar to AWS Lambda.
Azure Functions vs AWS Lambda?
Similar capabilities. Azure Functions has better C#/.NET support. Lambda has more triggers and ecosystem. Choose based on your cloud platform.
What languages do Azure Functions support?
C#, JavaScript, TypeScript, Python, Java, PowerShell, and custom handlers. C# has the best integration as expected from Microsoft.
What triggers Azure Functions?
HTTP requests, timers, queues, blobs, Cosmos DB changes, Event Grid, and more. Build event-driven applications. Good integration with Azure services.
Source: azure.microsoft.com