DICOMHERO is an open source C++ DICOM library distributed under the GPL license.
By buying the Commercial License you acquire the right to embed DICOMHERO in your products without being bound by the terms of the GPL license for the duration of the Commercial License
The complete license agreements can be found here: https://dicomhero.com/buy
In addition to the DICOMHERO source code and documentation available in the open source version, you get basic support, additional assets like periodical full dumps of the GIT repository, intermediate releases with bug fixes and enhancement not yet available in the GPL version.
Yearly commercial license to embed DICOMHERO in your products without being bound to the GPL requirements.