Migration Guide
Migrate from Lambda to Azure Functions
Migrate AWS Lambda functions to Azure Functions. Remap triggers, IAM to managed identity, and runtime configurations.
What you get
Risk assessment
Blockers, warnings, and unknowns ranked by severity
Effort estimate
Hours, t-shirt size, and role breakdown
Cost estimate
Labor, infrastructure, and tooling cost range
Migration steps
Ordered execution plan with durations
Open questions
What still needs to be answered before you start
Draft config or code
Starter configs when the migration path supports it
Why teams migrate from Lambda to Azure Functions
Good fit when
- +Teams migrating serverless workloads to Azure alongside other service migrations.
- +Organizations in the Microsoft ecosystem wanting consistent identity and tooling.
- +Functions that benefit from Azure's durable functions for complex orchestration.
Strengths
- Azure Durable Functions provide built-in orchestration for complex workflows.
- Deep integration with Entra ID for authentication and authorization.
- Flexible hosting plans (Consumption, Premium, Dedicated) for different workload profiles.
Tradeoffs
- Lambda's execution model differs from Azure Functions' trigger bindings approach.
- Lambda layers must be replaced with Azure Functions dependency management.
- Cold start behavior and scaling characteristics differ between platforms.
Migration notes
- Map Lambda triggers to Azure Functions trigger bindings (HTTP, Blob Storage, Service Bus, Event Grid).
- Translate Lambda IAM execution roles to Azure managed identities.
- Replace Lambda layers with Azure Functions dependency management (requirements.txt, package.json).
- Update environment variable references and secrets to Azure Key Vault.
How it works
Describe your migration
Select Lambda as source and Azure Functions as target. Add context about your setup — configs, docs, architecture notes.
Keshro runs the analysis
Keshro researches the path, finds similar past migrations, and generates a structured assessment with risks, effort, cost, and steps.
Get your plan
Review the migration plan, refine it with your team, and use it as a living document during execution.
Related migrations
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