Socket.io makes socket-based communication very easily programmable to the application. It has a great API which makes it very customizable and easy to start as well. Lastly it is opensource

I was working on a Chat application, and Socket.Io made it so easy for me to build it. It was just unimaginable. I created the chat application very easily, along with client-server communication. Functions provided by then are very easy to understand and use. It is also very reliable.

Have worked on multiple projects using socket io and it is one of the best socket based software out there