Duplicati [SEP] license
the terms of the GNU Lesser General Public License (LGPL), Duplicati is free software.
Technology.
Duplicati is written mostly in C# and implemented completely within the CLR, which enables it to be cross-platform. It runs well on 32-bit and 64-bit versions on Windows, macOS and Linux using either .NET Framework or Mono.
Duplicati has both a graphical user interface with a wizard-style interface and a command-line version for use in headless environments. Both interfaces use the same core and thus
third-party developer to inject a subcomponent into Duplicati without access to the source or any need to modify Duplicati itself. The license type is also flexible enough to allow redistribution of Duplicati with a closed-source storage provider. Duplicati is designed to be as independent of the provider as possible, which means that any storage medium that supports the common commands GET/PUT/LIST/DELETE can work with Duplicati.
The Duplicity model, on which Duplicati is based, relies heavily on components in the system, such as