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ONLYOFFICE Desktop Editors vs Letters: catalog facts
ONLYOFFICE Desktop Editors	Letters
Free The desktop editors are free and open source under AGPL v3. The company also sells hosted…	Free Free and open source under the GPL-3.0-or-later licence.
Windows, macOS, Linux	Linux
High compatibility with DOCX, XLSX and PPTX, the formats most people are sent Text, spreadsheet, presentation, form and PDF editors in one tabbed window	Designed to fit the GNOME desktop Available as a Flatpak from Flathub
Fewer advanced features than LibreOffice in areas such as databases and drawing The interface pushes the company’s cloud and enterprise products	Very new project, started in 2026 Linux only
Downloadable app	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0-or-later
No account needed	No account needed
Works offline	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.