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WPS Office vs Letters: catalog facts
WPS Office	Letters
Freemium A free ad-supported version is available. Premium is a paid subscription.	Free Free and open source under the GPL-3.0-or-later licence.
Windows, macOS, Linux, Android, iOS	Linux
Among the most faithful non-Microsoft renderers of Office documents One of the few full office suites with a maintained Linux build	Designed to fit the GNOME desktop Available as a Flatpak from Flathub
The free version shows advertisements and pushes cloud features Closed source, with a history of privacy concerns	Very new project, started in 2026 Linux only
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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