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Letters vs FreeOffice: catalog facts
Letters	FreeOffice
Free Free and open source under the GPL-3.0-or-later licence.	Free Free for personal and business use.
Linux	Windows, macOS, Linux
Designed to fit the GNOME desktop Available as a Flatpak from Flathub	Free for personal and business use Compatible with Word, Excel and PowerPoint files
Very new project, started in 2026 Linux only	Closed source Mobile apps are part of the paid SoftMaker Office
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0-or-later	License: Proprietary
No account needed	Not stated if an account is needed
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.