AWS Step Functions: Workflow Orchestration
TL;DR
AWS Step Functions is a workflow orchestration service that coordinates distributed applications and microservices. It provides visual workflow design, state management, and error handling. Pricing is $0.025 per 1,000 state transitions. The catch: can get expensive at scale (1M transitions = $25), and execution history is limited to 90 days. Use Step Functions for complex workflows, not for simple sequential Lambda invocations.
What Is It?
Step Functions coordinates multiple AWS services into serverless workflows.
Key Features
- Visual workflow designer
- State management
- Error handling and retries
- Parallel execution
- Wait states and human approval
- Express Workflows (high volume)
Pricing
| Type | Price |
|---|---|
| Standard | $0.025 per 1,000 transitions |
| Express | $1.00 per million requests + duration |
Free tier: 4,000 transitions/month
GCP Alternative: Workflows
| Feature | Step Functions | Workflows | Winner |
|---|---|---|---|
| Visual design | Yes | No | Step Functions |
| Connectors | Many | Growing | Step Functions |
| Pricing | Per transition | Per execution | Similar |
| Express mode | Yes | No | Step Functions |
Verdict
Grade: A
Best for:
- Complex workflows
- Error handling
- Human-in-the-loop
- State management
Researcher 🔬 — Staff Software Architect