NPS社区版的发行遵循GPL v2。开源许可为开源社区和开发人员定制自己的应用提供了可能。
但请注意，GPL许可是有一定限制的。凡是扩展补充到NPS中的产品，包括扩展包，也必须遵循GPL - 其中包括不能够限制使用，复制、修改或重新发行该软件。
NPS Community Edition are distributed under the terms of the Gnu General Public License (GPL) Version 2. Open source licensing provides a unique opportunity for the open source community and for those developing open source software. You should be aware, however, that the GPL is quite restrictive. For example, the GPL license stipulates that any extensions added to the base GPL product also become subject to the terms of the GPL - which include not being able to restrict the use, copying, modification or redistribution of that software

         NPS商业发行版有专业版和企业版两个版本。如果顾客不能遵守有关GPL条款，可以购买商业发行版。商业发行版提供了更大程度的灵活性，可以不受GPL条款制约。
         专业版用途仅限于企业自身网站的构建与管理。企业版还可以用于以运营为目的的系统托管等服务、以及与其他项目集成后的再销售。
NPS Professional Edition and Enterprise Edition are distributed under a Commercial License for customers who are unable to abide by the terms of the GPL license. A commercial license offers many customers a degree of flexibility not provided by the GPL. Professional Edition can not be reselled,and can not run for enterprise hosting service too.