When we talk about prices, we often talk only about Lambda costs. But we rarey use only Lambda in our applications. We usually have other building blocks like API Gateway, data sources like SNS, SQS or Kinesis and Log service (Cloud Watch). Also, we store our data either in S3 or in serverless databases like DynamoDB or recently in Aurora Serverless. All these services have their own price models which we have to pay attention to. Moreover, we have to consider application data transfer costs. In this talk, we will draw the complete picture about the costs in the serverless applications, look at the Total Cost of Ownership and make some recommendations about when it’s worth using serverless and when the traditional approach (EC2, Container).