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Warpinator vs Usermode FTP Server: catalog facts
Warpinator	Usermode FTP Server
Free Free and open source.	Free Free and open source under the GPL-3.0 or later.
Linux	Linux
Direct transfers over the local network No account or internet connection needed	Runs without root privileges Simple GTK4 graphical interface
Official app is Linux only Only works between devices on the same network	Linux only Small single-developer project with little documentation
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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