Patch Manager Plus is available in three variants - Professional edition, Enterprise edition and Free edition.
The table below provides a comparison of features available in the different editions.

Features Professional Enterprise Free
Suitable For Suitable for patching desktops in LAN Suitable for patching desktops in WAN Small Businesses with up to 25 devices
Supported OS Windows, Mac, Linux Windows, Mac, Linux Windows, Mac, Linux
Annual Subscription Price for 50 Computers, Single Technician

$245

$345

$345

$445

N/A

Service Pack Deployment
Third-Party Patch Management
Server Application Patch Management
Antivirus Definition Updates
Automatically Test and Approve Patches
Patch Reports
Patch Desktops of Roaming Users
Multi-Technician Support
Role Based Administration
Distribution Server for Bandwidth Optimization
*
*
Add-ons
Failover Server 
Multilanguage Support
 

Functional for all the computers based on the license count
* Only one Distribution Server can be installed
Not Available