You can download all the relevant software for the InsMsg system from here, including the server / administrator / Windows client / Android client / iOS client / Web demo. InsMsg system can run in local network and does not need any Internet connection. All the data and communication are completely under your control.
Online test server: login.insmsg.com Windows Client login port: 6055 Android/iOS login port: 6058 Test account: test1@insmsg.com test2@ ... test50@insmsg.com Login password: 123456