Is Easy Redmine open source software?

Easy Redmine builds upon the open-source foundation of Redmine and allows for some level of customization; it is primarily a commercial product that offers enhanced features and support for a fee.

While it is marketed as an "open-source upgrade" for Redmine, it operates under a commercial model that requires payment for certain features and services. Users can access the source code and make modifications, but the full functionality of Easy Redmine is available through paid plans, which include additional plugins and support options not found in the standard Redmine software.