Commercial License

The Commercial License is an agreement between Potix Corporation and organizations that do not want to release their application source code. Commercially licensed customers get a commercially supported product with assurances from Potix. Commercially licensed users are also free from the requirement of making their own application open source.

When your application is not licensed under either the GPL-compatible Free Software License as defined by the Free Software Foundation or approved by OSI, and you intend to or you may distribute ZK software, you must first obtain a commercial license to the ZK product.

Typical examples of ZK distribution include:

  • Selling software that includes ZK to customers who install the software on their own machines.
  • Selling software that requires customers to install ZK themselves on their own machines.
  • Building a hardware system that includes ZK and selling that hardware system to customers for installation at their own locations.

Specifically:

  • If you include ZK with an application that is not licensed under the GPL or GPL-compatible license, you need a commercial license for ZK.
  • If you develop and distribute a commercial application and as part of utilizing your application, the end-user must download a copy of ZK; for each derivative work, you (or, in some cases, your end-user) need a commercial license for ZK.

Non-Profits, Academic Institutions, and Private Individuals

If you represent a non-profit organization or an academic institution, we recommend you publish your application as an open source / free software project using the GPL license. In this manner, you are free to use ZK software free of charge under the GPL license. We believe that if you have strong reasons to not publish your application in accordance with the GPL, you should purchase commercial licenses.

If you are a private individual you are free to use ZK software for your personal applications as long as you do not distribute them. If you distribute them, you must make a decision between the Commercial License and the GPL.

To all free software enthusiasts we recommend our products under the GPL license. To anyone in doubt, we recommend the commercial license.

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