Open-source office suites

6 office suites whose code is public under an OSI-approved license, rated for privacy with evidence. Picks first, then by score.

1. Calligra Grade B

   Office and graphics suite from KDE with Words, Sheets, Stage, Karbon and other apps, using OpenDocument as its native file format.

   GPL-2.0-or-later. Source code

2. Etherpad Grade B

   Self-hosted, real-time collaborative text editor where several people edit the same document at once, with a plugin system and an HTTP API.

   Apache-2.0. Source code

3. Sandstorm Grade B

   Open source platform for self-hosting web apps. Apps are installed from the Sandstorm App Market with a few clicks, and each document or chat runs in its own isolated sandbox.

   Apache-2.0. Source code

4. Collabora Online Grade C

   Online office suite based on LibreOffice for documents, spreadsheets and presentations, with real-time collaborative editing. It is self-hosted or used through integrations such as Nextcloud.

   MPL-2.0. Source code

5. LibreOffice Grade C

   Office suite from The Document Foundation with Writer, Calc, Impress, Draw, Base and Math, using OpenDocument as its native file format.

   MPL-2.0. Source code

6. CryptPad Grade D

   End-to-end encrypted collaboration suite with rich text, spreadsheets, presentations, Markdown, Kanban, forms, diagrams and a file drive. Use the hosted CryptPad.fr service or self-host it.

   AGPL-3.0. Source code

Compare all 14 office suites, open source or not.