Socket.IO vs SockJS: What are the differences?
What is Socket.IO? Realtime application framework (Node.JS server). Socket.IO enables real-time bidirectional event-based communication. It works on every platform, browser or device, focusing equally on reliability and speed.
Socket.IO and SockJS are both open source tools. Socket.IO with 46.9K GitHub stars and 8.54K forks on GitHub appears to be more popular than SockJS with 1.72K GitHub stars and 276 GitHub forks.