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FTPS Server vs Usermode FTP Server: catalog facts
FTPS Server	Usermode FTP Server
Free Free, released into the public domain under CC0-1.0.	Free Free and open source under the GPL-3.0 or later.
Windows, Linux, Android, Command line	Linux
Encrypted FTP over TLS transfers Per-user permissions and isolated root folders	Runs without root privileges Simple GTK4 graphical interface
Small project with few users so far No GitHub releases published	Linux only Small single-developer project with little documentation
Downloadable app	Downloadable app
Closed source	Open source
License: CC0-1.0	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 October 2, 2026	Official website Full listing and sources Checked October 1, 2026

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