IOpipe is a high fidelity metrics and monitoring service which allows one to see inside Amazon Lambda functions for better insights into the daily operations and development of serverless applications. AWS Lambda is a new way to run event-driven applications as a service. Microservice architectures have been gaining popularity, where applications are broken into much smaller pieces (services) to enable better scalability, more agile development, among other benefits. Lambda embraces this philosophy, and allows developers to deploy a single function at a time. Once deployed, Lambda will manage the operational aspects of that function, from scaling to high availability. This is why many people use the term function as a service (FaaS) when describing AWS Lambda or Serverless architectures.