When building on AWS there are frequently multiple ways to achieve the same goal: You can run containers on ECS or EKS; you can use SQS or Amazon MQ; there’s MSK and Kinesis, … In this talk we will look at few different ways in which you might be paying more when selecting the (managed) Open Source Solution. From the expected higher base cost for a private control plane, to the more surprising costs that suddenly can appear in the EC2-Other category.