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Usermode FTP Server vs copyparty: catalog facts
Usermode FTP Server	copyparty
Free Free and open source under the GPL-3.0 or later.	Free Free and open source.
Linux	Self-hosted
Runs without root privileges Simple GTK4 graphical interface	Runs from a single portable file Resumable uploads with deduplication
Linux only Small single-developer project with little documentation	You host and secure the server yourself Many features means a lot of configuration to learn
Downloadable app	Self-hosted
Open source	Open source
License: GPL-3.0-or-later	License not stated
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.