There are lots of talk on Web API and WCF REST regrading which one to use for REST Services . Many people are recommending Web API for REST service and they are saying stickily use Web API instead of WCF REST but personally I am not agree with it .The reasons are follows

• We should not be stick on any particular technology i.e Web API or REST , It must  be decided  according to project requirement whether the Web API  or WCF REST is fit for  project requirement.
• There are lots of technologies in market but first we need to analyze project scope and requirement and according to it we need to decide technology.

 Lets see the difference between the Web API and WCF REST services based on the features

Scenario or Requirement	Web API	WCF REST
Need support of MSMQ.	No	Yes
Need duplex communication	No	Yes
Need End to end message security	No	Yes
Need Distributed transaction.	No	Yes
One way messaging.	No	Yes
Need to handle Long pooling requests	No	Yes
Need support of REST service in existing WCF Service	No	Yes
Need same code to be supported on both SOAP and REST	No	Yes
Need REST in ASP.NET MVC	Yes preferred	Yes
Need only HTTP service	Yes	Yes but not recommended
Open source	Yes	No

The above is the some differences according to the our project scenario and requirement.
Note 
 Learn WCF and REST Service on compilemode.com

• Learn WCF and WCF REST service 

Summary 
I hope this article is useful for all readers , If you have any suggestion regarding this article then please contact me.