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Usermode FTP Server vs Warpinator: catalog facts
Usermode FTP Server	Warpinator
Free Free and open source under the GPL-3.0 or later.	Free Free and open source.
Linux	Linux
Runs without root privileges Simple GTK4 graphical interface	Direct transfers over the local network No account or internet connection needed
Linux only Small single-developer project with little documentation	Official app is Linux only Only works between devices on the same network
Downloadable app	Downloadable app
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 23, 2026

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