What it is
ONLYOFFICE is a full office suite in the browser: documents, spreadsheets and presentations with real-time co-editing. Its file formats are highly compatible with Microsoft Office, so the documents your clients send open properly - which is where many alternatives fall down. It plugs into Nextcloud, so your files and your editing live in one place.
What you'd be replacing
Replaces the editing core of Google Docs or Microsoft 365: co-authored documents, spreadsheets and slides, with strong .docx/.xlsx/.pptx compatibility.
What you get
- Documents, spreadsheets, presentations
- Real-time co-editing and comments
- Strong Microsoft Office format compatibility
- Track changes and version history
- Works inside Nextcloud
- Templates
- PDF viewing and forms
- Browser-based - nothing to install
Good to know
Power users of Excel's deepest features (heavy macros, some advanced pivots) will notice gaps - that's true of every alternative. For everyday documents, sheets and decks, teams switch across comfortably.