Notes 
Features: Online document editors, platform for document management, corporate communication, mail and project management tools. Read more: Data Security & Access Control: Total control over data security.
Reviewed by Gabriel Bachmann
ONLYOFFICE
onlyoffice.com 4.0 (6)
Rate ONLYOFFICE: No account needed
Threat level
Hardened
A hardened pick. Worth the effort once you have chosen to shrink your footprint on purpose. Enough for most people. Threat levels
Our take
If your actual problem is Microsoft Office compatibility without handing files to Microsoft, this handles .docx and .xlsx more faithfully than most open alternatives. Note the encryption framing: it protects data in transit and storage on a server you control, it is not the browser-side zero-knowledge model of CryptPad. Self-host it for a team that lives in Office formats; if you mainly want client-side encryption, this is not that tool.
GitHub at a glance
ONLYOFFICE/DocumentServer AGPL-3.0 collaborationcollaborativedocdocxexcelnodenode-jsnodejsodpodsodtofficeonlyofficepptpptxpresentationspreadsheetwordxlsxlsx
Stars
7,089
+31 this week
Forks
1,329
164 watching
Last commit
9d ago
healthy
Latest release
v10.0.0
23d ago, 100+ total
Star history
Issues
66% closed
1,137
open
2,207
closed
+34 / -58
opened / closed, last 4 weeks
Opened vs closed, last 12 weeks
Commits, last 26 weeks
15 commits, active 7 of 26 weeks
18 contributors since Jul 2014
Languages
- Shell 100%
Updated daily from the GitHub API. Star tracking since Jun 10, 2026.
Website at a glance
onlyoffice.com
B+ score 80
Solid website security headers
Graded by Mozilla HTTP Observatory, tested 5d ago
Inspect this site yourself
Measures the security configuration of the tool's own website, not the privacy of the product itself. A strong tool can still score low here.
ONLYOFFICE alternatives
CryptPad Plenty of features: Rich text, code, presentation, sheet, form, kanban, whiteboard and CryptDrive. Encrypted data is hosted in France but you can also self-host it or select…
LibreOffice LibreOffice consists of programs for word processing, creating and editing of spreadsheets, slideshows, diagrams and drawings, working with databases, and composing…
PrivMX The complete teamwork experience: Chats & calls, files, tasks, kanban boards, mind maps and calendars. Team members can communicate one-on-one, group chat and section channels.…
Collabora Online Self-hosted online office suite built on LibreOffice, designed to integrate with Nextcloud and ownCloud.
Etherpad Highly customizable open-source online editor providing collaborative editing in real time.
Vikunja The project is still under development and the native apps are not final yet, but the web version works great. Offers an import feature from Todoist, Trello and Microsoft To-Do.
ONLYOFFICE license, in plain English
AGPL-3.0 Strong copyleft · network
Free to use, even commercially. Changes must be published under the same license, and running a modified version as a network service counts as distributing it.
Permits
- Commercial use
- Modification
- Distribution
- Patent use
- Private use
Requires
- Disclose source
- Network use is distribution
- Same license
- State changes
- License and copyright notice
Does not provide
- Liability cover
- Warranty
Why it matters: The network clause is the point. Anyone who runs a modified version as a hosted service has to publish those changes, so the code handling your data stays inspectable. This is why privacy-first projects reach for AGPL.
Plain-language summary of the project's license, not legal advice. Read the full text for the exact terms.