Jersey vs Koa: What are the differences?
Developers describe Jersey as "A REST framework that provides a JAX-RS implementation *". It is open source, production quality, framework for developing RESTful Web Services in Java that provides support for JAX-RS APIs and serves as a JAX-RS (JSR 311 & JSR 339) Reference Implementation. It provides it’s own API that extend the JAX-RS toolkit with additional features and utilities to further simplify RESTful service and client development. On the other hand, *Koa** is detailed as "Next generation web framework for node.js". Koa aims to be a smaller, more expressive, and more robust foundation for web applications and APIs. Through leveraging generators Koa allows you to ditch callbacks and greatly increase error-handling. Koa does not bundle any middleware.
Jersey and Koa can be categorized as "Microframeworks (Backend)" tools.
Koa is an open source tool with 26.9K GitHub stars and 2.47K GitHub forks. Here's a link to Koa's open source repository on GitHub.
According to the StackShare community, Koa has a broader approval, being mentioned in 62 company stacks & 170 developers stacks; compared to Jersey, which is listed in 7 company stacks and 11 developer stacks.