ZK Licensing

This is a page to clarify the current licensing models for ZK 3 and ZK 5 and what the ZK 5 license change means to our widespread community. The fundamental principle behind the license change is to offer our community more freedom when using ZK.

ZK 3's model has not changed since it was first released and will continue on under the GPL. The table below acts as a comparison of ZK 3 and ZK 5 licensing models.


 

ZK 3

ZK 5

CE (formerly SE)

Commercial

or

GPL

LGPL

PE

EE

Commercial

or

GPL

Commercial

or

ZK Open Source License (ZOL)

ZK 5 CE

The change from ZK 3's GPL and Commercial model to the LGPL offers the community the ability to use ZK 5 CE wherever they please, including open source or commercial applications.

With this new freedom we want the ZK 5 CE to be the centerpiece of our community. Therefore, we are working closely with community members to achieve the common goal of creating a better platform which all parties can leverage.


ZK 5 PE and EE

ZK 5 PE and EE are available under a commercial license providing the scalability, performance, testing and support that enterprise application deployments require. Both editions have been deemed certified to deliver enterprise-level capabilities to meet the needs of even the most demanding organizations.

ZK Open Source License (ZOL)

We also strongly believe in the community therefore have made PE and EE's certified performance freely available to projects which are open source or compatible with the GPL, under ZK Open Source License. ZOL is a free ZK license for open source and GPL compatible projects. If your project is open source or GPL compatible please contact us to claim your ZOL for PE or EE.


ZK Contributor License Programs

ZK has a large community of individuals and organizations who regularly collaborate with us benefiting both parties. In the future we hope many will follow their lead by sharing works such as blog posts, small talks or their ZK experiences with the community. To show our appreciation we offer special programs for our contributors allowing them to purchase ZK products and services at special rates.




Check out licensing for other ZK products

Read the FAQ on ZK 5 licensing and view the ZK 3 licensing options

View pricing on ZK 5 Commercial License Packages, extension options and more.