Netty vs Rapidoid: What are the differences?
Developers describe Netty as "Asynchronous event-driven network application framework". Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server. On the other hand, Rapidoid is detailed as "No-Bullshit Web Framework for Java". Rapidoid consists of several de-coupled modules/frameworks which can be used separately or together: http-fast, gui, web, fluent, u, and more.
Netty can be classified as a tool in the "Concurrency Frameworks" category, while Rapidoid is grouped under "Frameworks (Full Stack)".
Netty and Rapidoid are both open source tools. It seems that Netty with 19.9K GitHub stars and 9.05K forks on GitHub has more adoption than Rapidoid with 1.42K GitHub stars and 134 GitHub forks.