OnlyOffice — An open-source office suite (AGPL 3.0) for editing documents, spreadsheets, and presentations, with a self-hosted DocSpace collaboration platform priced per admin, not per user.
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Best for: Organizations that need Microsoft Office-compatible editing with the option to self-host under an open-source license.
Pricing: Free self-hosted Community Server and DocSpace Startup plan; Business Cloud starts at $20/admin/month.
- ONLYOFFICE is distributed under the AGPL 3.0 open-source license.
- DocSpace Business Cloud costs $20/admin/month (discounted from $30), with unlimited regular users free.
- The free Startup DocSpace plan supports up to 3 admins and 2GB storage.
- ONLYOFFICE reports over 21 million users, including UNESCO and the Red Cross.
Limitations: Complex Word/Excel formatting can lose fidelity compared to Microsoft Office.; Enterprise on-premises pricing is not published.; Per-admin pricing model requires extra comparison work against per-user competitors.
Top alternatives: Microsoft 365, Google Workspace, LibreOffice — full list
What is OnlyOffice?
OnlyOffice is an open-source office suite: document, spreadsheet, and presentation editors plus PDF form tools, distributed under the AGPL 3.0 license with source code on GitHub. OnlyOffice ships in three forms: free desktop editors for Windows, macOS, and Linux; a self-hosted Community Server anyone can run on their own infrastructure at no cost; and DocSpace, a hosted collaboration platform that charges only for admin seats while inviting unlimited regular users for free. Real-time co-editing tracks changes at the character level, and built-in AI assistants handle content generation, translation, and text extraction from scanned documents. Notable deployments include UNESCO and the Red Cross, and the company reports more than 21 million users. The self-hostable AGPL core is what separates OnlyOffice from Microsoft 365 and Google Workspace, which offer no equivalent on-premises option.
OnlyOffice is an open-source office suite covering documents, spreadsheets, presentations, and PDF forms, distributed under the AGPL 3.0 license with source available on GitHub. The desktop editors and Community Server are free to self-host; the hosted DocSpace collaboration platform starts at $20/admin/month (discounted from $30) for the Business Cloud tier, while a free Startup plan gives up to 3 admins and unlimited users 2GB of storage. It targets organizations — schools, government agencies, and businesses — that want Microsoft Office-compatible editing with the option to keep data entirely on their own servers rather than a vendor's cloud. Enterprise on-premises deployment is priced by connection count and requires contacting sales.
Standout feature: AGPL 3.0-licensed source code that organizations can audit and self-host, combined with a DocSpace pricing model that charges only for admin seats while unlimited regular users join free.
Biggest weakness: Business Cloud pricing is per-admin rather than per-user, which can be confusing to compare against competitors, and users switching from Microsoft Office report formatting fidelity issues on complex documents with heavy macros or advanced layout.
Pros
- AGPL 3.0 source code available on GitHub; fully self-hostable for organizations that need to keep data on-premises.
- DocSpace charges only for admin seats, with unlimited regular users invited free.
- Native apps across Windows, macOS, Linux, iOS, and Android, plus 40+ third-party integrations including Nextcloud and Moodle.
- Real-time co-editing with character-level change tracking and built-in AI content tools.
Cons
- Complex documents with advanced Word/Excel formatting or macros can lose fidelity when opened in ONLYOFFICE.
- Enterprise on-premises pricing is not published; requires a sales conversation.
- Per-admin pricing model on Business Cloud takes more effort to compare against per-user competitors.
- DocSpace's interface is less polished than Google Workspace or Notion for non-technical teams.
OnlyOffice pricing
Free tier · paid from $20/mo · verified from the vendor's pricing page
| Plan | Price | Notes |
|---|---|---|
| Startup (DocSpace) | Free | Free; up to 3 admins, unlimited users and guests, 2GB storage per space, up to 12 rooms. |
| Business Cloud | $20/mo | Per admin, unlimited users free; discounted from a regular $30/admin/month; 250GB storage per admin, unlimited rooms. |
| Enterprise (on-premises) | Custom | Custom pricing, billed per connection; unlimited storage, admins, users, and rooms; self-hosted deployment. |
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