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LibreOffice Writer vs Letters: catalog facts
LibreOffice Writer	Letters
Free Free and open source, developed by The Document Foundation and community contributors.	Free Free and open source under the GPL-3.0-or-later licence.
Windows, macOS, Linux	Linux
Free with no account or subscription Suited to long documents and books as well as short notes	Designed to fit the GNOME desktop Available as a Flatpak from Flathub
Installed with the whole LibreOffice suite rather than on its own No built-in real-time co-editing like online word processors	Very new project, started in 2026 Linux only
Downloadable app	Downloadable app
Open source	Open source
License: MPL-2.0	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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