ONLYOFFICE — Trust Report & Verified Download

Name: ONLYOFFICE
Rating: 3.6 (166 reviews)

Trust Report

Independently checked by Altapp where possible; developer-reported data is labeled as such. Last full review: Jul 17, 2026.

Verified Source

Builds come directly from the developer with published integrity data.

SHA-256 checksums published for every release asset on the official GitHub releases page
Full source code public under AGPL-3.0 at github.com/ONLYOFFICE/DesktopEditors (5.1k stars)
Official distribution via onlyoffice.com plus Snap, Flatpak, AppImage, deb and rpm channels
iOS and Mac builds delivered through Apple's App Store review and signing pipeline

Data & Permissions

The desktop suite edits documents fully offline; the mobile app has a tracker history.

Desktop editors create, open and edit local files with no internet connection required
Android app was reported to include Facebook and Google tracking libraries (Exodus findings raised in GitHub issue #202, 2022)
Cloud connectivity (DocSpace, Nextcloud and others) is opt-in, not required for local work
Privacy policy published by the EU-based developer, subject to GDPR

Known Risks

Server components have accumulated CVEs; the desktop suite stays actively patched.

Self-hosted Document Server has had CVEs, including macro XSS fixed in Docs 8.1.0 and path traversal CVE-2023-46988 fixed in 8.0.1
No independent third-party security audit has been published for the suite
Open-source AGPL-3.0 model keeps the code open to community review
Active development cadence — version 9.4.0 shipped 19 May 2026

Verification reflects the version listed above. Practices may change between releases. How we verify ›

Our verdict: a genuinely free, open-source Microsoft Office alternative with excellent OOXML fidelity — verify downloads with the published checksums and note the mobile app's past tracker findings.

ONLYOFFICE Desktop Editors is a free, open-source office suite from Latvia-based Ascensio System SIA that bundles word processing, spreadsheets, presentations, and a capable PDF editor into a single application for Windows, macOS, and Linux. Its standout strength is fidelity to Microsoft's OOXML formats: DOCX, XLSX, and PPTX files open and save with formatting intact, making it one of the smoothest transitions away from Microsoft Office. Companion mobile apps for iOS and Android and web-based editors extend the suite beyond the desktop.

The entire codebase is published on GitHub under the AGPL-3.0 license, and every release ships with SHA-256 checksums so downloads can be verified against tampering. The desktop suite works fully offline; connecting it to a cloud — ONLYOFFICE DocSpace, Nextcloud, or another document server — is strictly optional. Development is brisk, with version 9.4.0 arriving in May 2026 carrying dark-mode spreadsheets, new presentation themes, and refreshed form-signing tools.

Alternatives to ONLYOFFICE

See all 3 ›

LibreOffice

Free open-source office suite

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Choose LibreOffice if

You want a fully community-governed office suite with the longest open-source track record

VerifiedFree

Nextcloud

Self-hosted file sync and collaboration

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Choose Nextcloud if

You want self-hosted file sync and collaboration built around your documents

VerifiedFree · Enterprise from €71.29/user/yr

Notion

All-in-one connected workspace

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Choose Notion if

You want a connected cloud workspace for notes and docs rather than a classic office suite

VerifiedFree · Plus $10/mo

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Frequently asked questions

Is ONLYOFFICE free?

Yes — the pricing listed at our last review is “Free”.

Is ONLYOFFICE safe to use?

Altapp's independent Trust Report (last full review Jul 17, 2026) shows 7/9 checks passed, covering source verification, data & permissions, and known risks. Verification reflects the version listed on this page.

Which platforms does ONLYOFFICE run on?

Windows 7+ · macOS 10.10+ · Linux.

What are the best ONLYOFFICE alternatives?

LibreOffice, Nextcloud, Notion — each with its own verified Trust Report on Altapp. See the full list ›

Information

Developer: Ascensio System SIA
Size: 356 MB
Category: Productivity
Compatibility: Windows 7+ · macOS 10.10+ · Linux
Languages: English +14 more
License: AGPL-3.0
Country: Latvia
Latest Version: 9.4.0 · May 2026

Official Website Privacy Policy Source Code

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