Abstract: The study was conducted to design and develop a prototype intranet-based instant messenger at Capiz State University, Poblacion Mambusao Campus, Mambusao, Capiz, Philippines and to determine its acceptability in terms of necessity, practicability and reliability. The software was designed as client-server application for the use of the students and employees to send, receive and check messages and to do chat. The users are allowed only to use the application that performs chatting, sending and checking of messages.