Windows Communication Foundation (WCF) is a system that makes certain aspects of execution achievable, and also a set of protocols and tools used for building software, in the .NET Framework designed by Microsoft. WCF as it is popularly called, can also be used in the deployment and utilization of SOA – Service Oriented Architecture.
Representational State Transfer (REST) is an architectural model of constructing web services. REST works on any platform just like the ASP.NET Core. In comparison to WCF, REST is significantly disadvantaged concerning the identification of random forms. Contrarily, Windows Communication Foundation (WCF) allows the transfer of extensive messages with random content forms to the server, because of the unified DataContracts. Json can accomplish this too, but a custom serialization will be needed. REST is known for exploiting HTTP when it is necessary for Web API.
The need for effective options apart from WCF is getting increasingly voiced by tech experts. Some of them believe that to be confident in testing new waters that are entirely new, WCF is no longer the best choice in getting those greenfield projects accomplished. For instance, if you are a software engineer and developer, and you are working towards building an HTTP-based web service, it is better to look for other alternatives.
However, Windows Communication Foundation (WCF) can still be used in building HTTP-based web services, but due to the evolution of software technology, a modern HTTP-based web service requires more than WCF. WCF appears to be phasing out with advanced options gaining more recognition. Other notable mentions, which are considered as alternatives to WCF are ASP.NET SignalR, ASP.NET MVC, ASP.NET Web API, and Katana.