SocketCluster vs Socket.IO: What are the differences?
SocketCluster: An open, scalable realtime engine for Node.js. SocketCluster is a fast, highly scalable HTTP + realtime server engine which lets you build multi-process realtime servers that make use of all CPU cores on a machine/instance. It removes the limitations of having to run your Node.js server as a single thread and makes your backend resilient by automatically recovering from worker crashes and aggregating errors into a central log; 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.
SocketCluster and Socket.IO can be primarily classified as "Realtime Backend / API" tools.
Some of the features offered by SocketCluster are:
- Resilient on both the client and backend - Process crashes, lost connections and other failures are handled seamlessly.
- Scales linearly as you add more CPU cores and workers (assuming a decent OS) - Tested with up to 16 cores.
- Also designed to scale horizontally across multiple machines. See sc-redis sample.
On the other hand, Socket.IO provides the following key features:
- Real-time analytics - Push data to clients that gets represented as real-time counters, charts or logs.
- Binary streaming - Starting in 1.0, it's possible to send any blob back and forth: image, audio, video.
- Instant messaging and chat - Socket.IO's "Hello world" is a chat app in just a few lines of code.
"Cluster mode is awesome" is the primary reason why developers consider SocketCluster over the competitors, whereas "Real-time" was stated as the key factor in picking Socket.IO.
SocketCluster and Socket.IO are both open source tools. Socket.IO with 46.9K GitHub stars and 8.54K forks on GitHub appears to be more popular than SocketCluster with 5.35K GitHub stars and 283 GitHub forks.
Trello, MakerSquare, and Kobra.io are some of the popular companies that use Socket.IO, whereas SocketCluster is used by notthatbad technologies UG, Livevents, and StaffConnect. Socket.IO has a broader approval, being mentioned in 560 company stacks & 395 developers stacks; compared to SocketCluster, which is listed in 6 company stacks and 3 developer stacks.