Winpopup LAN MessengerWinpopup LAN Messenger 
Winpopup LAN Messenger (WinPopup.exe). Winpopup LAN Messenger is a program that sends messages securely within your local network.
Boost your local network communication with a fast, secure LAN messenger designed for teams, schools, and offices. This lightweight tool delivers encrypted messaging, intuitive chat windows, and smooth group discussions without requiring any Internet access—ideal for stable offline collaboration and high-speed local file sharing.
Winpopup LAN Messenger provides a seamless intranet messaging solution for Windows, enabling users to connect instantly even without knowing each other’s IP addresses. With automatic DHCP detection, peer discovery is effortless, making it perfect for workplaces seeking an easy internal chat system or an alternative to cloud-based collaboration tools. The app’s secure peer-to-peer File Transfer keeps files inside the network, while optional Server mode enables offline messaging for reliable team communication.
Installation is simple—just deploy the client on each computer and start chatting immediately. The clean, ICQ- and MSN-style interface displays active users and organized message panels, making it easy to follow conversations. Whether you manage a small office LAN or a campus-wide setup, this messenger supports fast internal communication, encrypted texting, and efficient workflow coordination.