Serverless applications usually comprise several AWS services, integrated with custom code run in Lambda functions. While Lambda can be integrated with most AWS services, the services most commonly used in serverless applications are:

Category	AWS service
Compute	AWS Lambda
Data storage	Amazon S3 Amazon DynamoDB Amazon RDS
API	Amazon API Gateway
Application integration	Amazon EventBridge Amazon SNS Amazon SQS
Orchestration	AWS Step Functions
Streaming data and analytics	Amazon Data Firehose

There are many well-established, common patterns in distributed architectures that you can build yourself or implement using AWS services. For most customers, there is little commercial value in investing time to develop these patterns from scratch. When your application needs one of these patterns, use the corresponding AWS service:

Pattern	AWS service
Queue	Amazon SQS
Event bus	Amazon EventBridge
Publish/subscribe (fan-out)	Amazon SNS
Orchestration	AWS Step Functions
API	Amazon API Gateway
Event streams	Amazon Kinesis

These services are designed to integrate with Lambda and you can use infrastructure as code (IaC) to create and discard resources in the services. You can use any of these services via the AWS SDK without needing to install applications or configure servers. Becoming proficient with using these services via code in your Lambda functions is an important step to producing well-designed serverless applications.