++ Zend Guard have some of the features that can be a hardcode for your application to avoid customization or some one might change them to reverse engineering that might backfires in you or find vulnerabilities or the creations in them.
++ Enable the set up of licenses across your products that be uses across your desired products that you release ( virtual or on the cloud), or if you upload them into easy to hack pages would avoid any further actions on the already created content, or hack on the applications for free usage of sort. Review collected by and hosted on G2.com.
++it's does demand a high learning curve on the process of the set up of the applications on php encoding, and while creating licensing policies might be a little problematic.
++ Is for an specific public aimed, this making it a little single use, however I am sure that a software development company would be able to protect their intelectual property and copyright protection Review collected by and hosted on G2.com.
Protect all of your PHP code with Zend Guard. This software is a must-have for every developer that writes code. Review collected by and hosted on G2.com.
The installation process in setup could be a little easier. Review collected by and hosted on G2.com.