Serial Port Monitor is divided into Standard, Professional and Company Editions.
The difference you can see here:
| Feature | Standard | Pro | Company |
|---|---|---|---|
| Analyze any type of serially connected hardware or software |  | | |
| Simultaneous monitoring of an unlimited number of COM ports |  |  | |
| Logging of data received and sent from a monitored COM port |  |  | |
| Monitoring COM ports of different types (RS232/RS422/RS485) | |  | |
| Sniffing RS232 ports already used by another application | – |  | |
| Exchanging data with any serial port via Advanced Send Dialog | – |  | |
| Changing the parameters of a serial port on-the-fly | – |  | |
| 1 license can be used on 10 computers | – | – |  |