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FileZilla vs WS_FTP Professional: catalog facts
FileZilla	WS_FTP Professional
Freemium The client is free and open source. FileZilla Pro, which adds cloud storage back ends, is…	Paid Commercial software bought directly from Progress or through its sales team.
Windows, macOS, Linux	Windows
FTP, FTP over TLS and SFTP in one client Site manager for saved connections, plus a transfer queue and resume	Supports encrypted transfers and scheduled, automated tasks Pairs with WS_FTP Server from the same vendor
Cloud storage back ends are reserved for the paid Pro edition The official site is advertising-supported and requires JavaScript to serve a download	Paid licence with no free tier Windows only
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-2.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 1, 2026

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