Who is AWS Lambda best for?

Best use cases for AWS Lambda

• Event-driven backends on AWS where Lambda integrates natively with SQS, SNS, EventBridge, S3, DynamoDB Streams, and API Gateway — building event-driven architecture without custom orchestration.
• Teams that want scale-to-zero compute for workloads with unpredictable or intermittent traffic — Lambda handles zero traffic at zero cost and scales to thousands of concurrent executions in seconds.
• Organizations with strong AWS operational practices where IAM roles, CloudWatch observability, VPC networking, and AWS X-Ray tracing integrate naturally with Lambda without additional tooling.

Who should avoid AWS Lambda?

• Edge latency is the product (middleware/personalization) and tail latency is unacceptable
• You need minimal cloud coupling and want portability as a primary requirement
• Your workload is sustained, egress-heavy, and better suited to always-on compute

Upgrade triggers for AWS Lambda

• Tail latency and cold start impact become visible to users or SLAs
• Concurrency/throttling issues appear during bursts and require capacity controls
• Spend spikes require workload math and architectural changes (caching, batching)

Next steps