WCF vs ZeroMQ: What are the differences?
What is WCF? A runtime and a set of APIs for building connected, service-oriented applications. It is a framework for building service-oriented applications. Using this, you can send data as asynchronous messages from one service endpoint to another. A service endpoint can be part of a continuously available service hosted by IIS, or it can be a service hosted in an application.
What is ZeroMQ? Fast, lightweight messaging library that allows you to design complex communication system without much effort. The 0MQ lightweight messaging kernel is a library which extends the standard socket interfaces with features traditionally provided by specialised messaging middleware products. 0MQ sockets provide an abstraction of asynchronous message queues, multiple messaging patterns, message filtering (subscriptions), seamless access to multiple transport protocols and more.
WCF can be classified as a tool in the "Realtime Backend / API" category, while ZeroMQ is grouped under "Message Queue".
ZeroMQ is an open source tool with 5.34K GitHub stars and 1.57K GitHub forks. Here's a link to ZeroMQ's open source repository on GitHub.
According to the StackShare community, ZeroMQ has a broader approval, being mentioned in 35 company stacks & 12 developers stacks; compared to WCF, which is listed in 8 company stacks and 3 developer stacks.