You can also download the official trial version directly from the Modbus Poll Website to evaluate the software legally before purchasing.

Modbus Poll 3 to 9 licenses: $ 119.00 per license. 10+ licenses: $ 109.00 per license. Modbus Tools 4 Essential Modbus Testing Tools For Your Sensor - ANDIVI

Some third-party sites offer a free "Simple" version for basic monitoring needs.

Allows you to test the software for a limited time (typically 30 days or limited connection time) to ensure it works with your specific hardware.