Disclosed communication flow modeling solution is significantly streamlined in a user friendly way to shield users from the technical complexities usually required. At design time, an orchestration flow modeling application receives user instruction to open or create a communication flow modeling project. Per configuration specific to an enterprise associated with the user, a custom drag-and-drop communication flow modeling environment with a canvas and modeling entities is provided. Responsive to the user dragging and dropping a set of modeling entities from the menu onto the communication flow modeling canvas and drawing connections between them, the orchestration flow modeling application logically connects the modeling entities to form a valid communication flow and stores it in a database. The communication flow undergoes an approval process. Once approved, it is activated for execution by an orchestration server. The orchestration server automatically orchestrates services needed by the communication flow at runtime without user programming.