Difference between WCF and WebAPI
WCF ASP.NET Web API Enables building services that support multiple transport protocols (HTTP, TCP, UDP, and custom transports) and allows switching between them. HTTP only. First-class programming model for HTTP. More suitable for access from various browsers, mobile devices etc enabling wide reach. Enables building services that support multiple encodings (Text, MTOM, and Binary) of the same message type and allows switching between them. Enables building Web APIs that support wide variety of media types including XML, JSON etc. Supports building services with WS-* standards like Reliable Messaging, Transactions, Message Security. Uses basic protocol and formats such as HTTP, WebSockets, SSL, JQuery, JSON, and XML. There is no support for higher level protocols such as Reliable Messaging or Transactions. Supports Request-Reply, One Way, and Duplex message exchange patterns. HTTP is request/response but additional patterns can be supported through SignalR and Web