Serverless functions
AWS Lambda Web Functions vs Azure Container Apps / Azure App Service
AWS Lambda Web Functions (launched Oct 2026) map partly to Azure Container Apps and Azure App Service.
Azure has no function-branded equivalent; the nearest serverless option is Container Apps with scale to zero.
Side-by-side comparison
| Aspect | Amazon Web Services | Microsoft Azure |
|---|---|---|
| Service | AWS Lambda Web Functions | Azure Container Apps Azure App Service |
| Lifecycle | Launched Oct 12, 2026 in five Regions, with Node.js 24 on Arm64 only at launch. | Generally available Generally available |
| What it is | Run standard port-listening Node.js web apps (Express, Hono, Next.js) on Lambda without adapters. Each environment handles many concurrent requests, with active-CPU billing and optional multi-Region latency routing. | Serverless container platform built on Kubernetes (KEDA, Envoy, Dapr) without exposing the Kubernetes API. Includes apps, jobs, revisions and traffic splitting, scale to zero, Consumption and Dedicated workload profiles, and serverless GPUs. A managed PaaS for web apps, APIs, and containers (Windows or Linux). It includes deployment slots, autoscale, built-in auth, managed certificates, and App Service Environment for isolation. |
| Pricing model | Per request plus active CPU time plus memory over the environment's lifetime, plus data transfer. | Container Apps is billed per vCPU-second, GiB-second, and requests. App Service is billed per plan instance. |
| Docs | AWS Lambda Web Functions docs | Azure Container Apps docs Azure App Service docs |
| Pricing page | AWS Lambda Web Functions pricing | Azure Container Apps pricing Azure App Service pricing |
| Exams | DVA-C02 Retiring | AI-200 |
Key differences
- Lambda Web Functions run Node.js 24 apps on Arm64 (at launch), deployed as .zip. Each environment serves multiple concurrent requests, billed on active CPU and memory, with built-in multi-Region latency routing.
- Container Apps runs any container image with HTTP scaling and scale to zero. App Service runs code or containers on always-on plan instances. Multi-region needs Front Door on Azure.
- Azure Functions custom handlers can wrap a web server, but they still use the Functions host and trigger model.
Pricing summary
Pricing models only. No prices are quoted because they change by region and over time.
- AWS
- Per request plus active CPU time plus memory over the environment's lifetime, plus data transfer. AWS Lambda Web Functions pricing →
- Azure
- Container Apps is billed per vCPU-second, GiB-second, and requests. App Service is billed per plan instance. Azure Container Apps pricing → Azure App Service pricing →
Certification exam mapping
| Exam | Provider | Level | Status |
|---|---|---|---|
| AWS Certified Developer – Associate DVA-C02 | AWS | Associate | retiring Being updated to DVA-C03. Registration for DVA-C03 opens Oct 27, 2026. Last day to take DVA-C02 is Nov 30, 2026. |
| Microsoft Certified – Azure AI Cloud Developer Associate AI-200 | Azure | Associate | current Back-end services, containers, and architecture for AI solutions on Azure. |
Relevance is based on each exam's published scope, not a line-by-line objective match. Check the official study guide.
Verification notes
- Lambda Web Functions launched Oct 12, 2026 in five Regions. Runtime and Region coverage is expected to expand.
FAQ
What is the Azure equivalent of AWS Lambda Web Functions?
AWS Lambda Web Functions (launched Oct 2026) map partly to Azure Container Apps and Azure App Service. Azure has no function-branded equivalent; the nearest serverless option is Container Apps with scale to zero.
How does pricing compare between AWS Lambda Web Functions and Azure Container Apps and Azure App Service?
AWS: Per request plus active CPU time plus memory over the environment's lifetime, plus data transfer. Azure: Container Apps is billed per vCPU-second, GiB-second, and requests. App Service is billed per plan instance. Check the official pricing pages for current rates.
Which certification exams cover this topic?
AWS Certified Developer – Associate (DVA-C02) [retiring]; Microsoft Certified – Azure AI Cloud Developer Associate (AI-200).