SignalR takes advantage of several transports, automatically selecting the best available transport given the client's and server's best available transport. SignalR takes advantage of WebSocket, an HTML5 API that enables bi-directional communication between the browser and server. SignalR will use WebSockets under the covers when it's available, and gracefully fall back to other techniques and technologies when it isn't, while the application code remains the same

We don't save any line you write in our database! For us, security is the more important thing and we decide to not track our users messages and to offer them complete solution, with no way, to anyone ever find what is written in the chat rooms.