Serverless is a subscription-based application performance monitoring tool tailored for developers managing serverless architectures. It enables users to define AWS Lambda functions and their triggers using a straightforward YAML syntax, facilitating automatic deployment and integration in the cloud. The platform supports a wide range of use cases, allowing developers to create REST APIs, scheduled tasks, and front-end applications using familiar programming languages such as Node.js, Python, and Java.

Additionally, Serverless offers powerful metrics to track usage, performance, and errors across all serverless applications, providing a centralized view regardless of AWS accounts or regions. The tool also includes features for sharing secrets and managing AWS account access seamlessly. With a starting price of $20 per month, Serverless caters to a variety of organizations, from small businesses to enterprises, ensuring efficient development and monitoring of serverless solutions.