Euro-Office Is Finally Coming to the Desktop

Euro-Office, the open-source office suite backed by a coalition of European tech companies, is making the jump from the browser to the desktop. Nextcloud has announced dedicated desktop applications for Windows, Linux, and macOS, a major step for a project that until now lived almost entirely inside a web browser.

The announcement came on September 16, 2026, alongside the release of Nextcloud Hub 26 Summer. There’s one catch: the desktop app isn’t available for download yet. Nextcloud says it will arrive “in the coming weeks” and has not given an exact date.

Here’s what we know about the desktop app, who’s behind Euro-Office, and the licensing controversy surrounding the project.

Key Facts at a Glance

From Browser to Desktop

Until now, Euro-Office users worked mainly through a web browser. The suite has been available as part of Nextcloud Office, where users create and edit documents, spreadsheets, and presentations inside their Nextcloud environment.

The upcoming desktop client changes that. According to Nextcloud, the app will let users:

• Open and edit documents directly on Windows, Linux, or macOS, without relying on a browser
• Work with local files and save them to their computer
• Use local fonts and settings, like a traditional office suite
• Connect to a Nextcloud server to store files on their own infrastructure

In practice, Euro-Office will feel much closer to Microsoft Office or LibreOffice on the desktop while keeping its cloud collaboration features.

Real-Time Collaboration Across Desktop and Browser

The hybrid approach is one of the most interesting parts of the announcement. A person using the desktop app can edit the same document, in the same session, as a colleague working in a web browser through Nextcloud.

That gives users three ways to work:

1. Locally, with files saved on their own computer
2. In the browser, through Nextcloud
3. A mix of both, with desktop and web users collaborating on the same file

Supported Platforms

Euro-Office is targeting all three major desktop operating systems:

What this means for U.S. users:

• Windows on ARM is covered. Owners of Snapdragon-powered Copilot+ PCs get a native build.
• Mac support is Apple Silicon only. The announced macOS build targets M-series Macs. Intel-based Macs are not on the announced list.
• Linux users get both architectures, including ARM64 machines and single-board computers.

Not Available Yet: Beware of Fake Installers

The official Euro-Office desktop app cannot be downloaded yet. Nextcloud Hub 26 Summer shipped on September 16, 2026, but the desktop app will follow later, and no public release date has been announced.

🔒 Security tip: If you see an installer claiming to be the “official” Euro-Office desktop release before Nextcloud announces it, be cautious. New software launches are a common lure for malware. Wait for download links from Nextcloud or the official Euro-Office project.

Development itself is public. The Euro-Office project keeps its desktop source code on GitHub, which shows active work on the Windows, Linux, and macOS versions. Developers and testers can follow progress there.

What Is Euro-Office?

Euro-Office is an open-source office suite created through a collaboration between European companies and organizations. Its goal is to offer an alternative to Microsoft Office built on open-source development, European infrastructure, and greater control over data.

Timeline

• March 2026: the Euro-Office initiative is announced.
• June 9, 2026: the first stable version is released, with collaborative editing of documents, spreadsheets, and presentations.
• September 16, 2026: desktop apps are announced alongside Nextcloud Hub 26 Summer.
• Coming weeks: desktop apps become available for download.

Who’s Behind It

The project’s contributors and partners include:

• Nextcloud (Germany), the open-source collaboration platform
• IONOS (Germany), a major European cloud and hosting provider
• Eurostack
• XWiki (France), an open-source wiki and knowledge platform
• OpenProject (Germany), open-source project management
• Soverin
• Abilian (France)
• bTactic (Spain)
• Open-Xchange (Germany), email and collaboration software
• Office.eu

Inside Nextcloud, Euro-Office is offered as one office option alongside others such as Collabora Online, which is based on LibreOffice.

The ONLYOFFICE Licensing Dispute

Euro-Office has a controversy that potential users should know about.

Euro-Office’s document editors are derived from technology originally developed by ONLYOFFICE, a well-known open-source office suite. ONLYOFFICE releases its code under the GNU Affero General Public License version 3 (AGPLv3), which lets others reuse and modify it under certain conditions.

Here’s how the dispute unfolded:

1. March 2026: ONLYOFFICE publicly accused the Euro-Office project of violating its licensing requirements. ONLYOFFICE argued that its AGPLv3 license includes additional terms on attribution and branding, and that Euro-Office had not complied with them.
2. Partnership suspended: ONLYOFFICE then announced it was suspending its partnership with Nextcloud, citing Euro-Office and its licensing and attribution concerns.
3. Development continues: work on Euro-Office, including the desktop apps, has gone ahead.

This is best understood as a contested licensing issue, not a settled legal matter. ONLYOFFICE has stated its position publicly, and the wider open-source community has debated how AGPLv3’s provisions on additional terms apply here. No court ruling has been reported.

Why It Matters to Users

• Individual users are unlikely to be directly affected when using open-source software.
• Businesses and government agencies with strict compliance or procurement rules may want their legal teams to follow the dispute before large deployments.
• The broader open-source world is watching, since the case touches on how far original developers can control branding and attribution when their code is forked.

Why Europe Is Building Its Own Office Suite

Euro-Office is part of a broader European push for digital sovereignty: reducing dependence on non-European, mostly American, tech providers for critical software.

The main drivers:

• Data protection concerns. U.S. laws such as the CLOUD Act can, under certain conditions, let American authorities request data held by U.S. companies, even data stored abroad. This sits uneasily with the EU’s General Data Protection Regulation (GDPR).
• Vendor lock-in and costs. Subscription licensing makes long-term budgeting and switching harder for public bodies.
• Geopolitical uncertainty. Trade tensions have pushed European leaders to look for homegrown alternatives.
• Open standards. Many European governments favor open formats to keep public documents vendor-neutral.

Euro-Office joins other European efforts, including Germany’s openDesk (developed under ZenDiS, the Center for Digital Sovereignty) and France’s La Suite numérique. Several public bodies, such as the German state of Schleswig-Holstein and Denmark’s Ministry of Digital Affairs, have also announced moves from Microsoft Office toward LibreOffice.

Euro-Office vs. the Competition

Why U.S. Readers Should Care

Euro-Office is a European project, but it matters in the United States too:

• More competition for Microsoft and Google can push prices down and innovation forward.
• Self-hosting appeal. U.S. businesses, schools, and nonprofits that already run Nextcloud get a new office option that keeps documents on their own servers.
• Doing business in Europe. Companies that work with European governments may increasingly exchange files with sovereign tools like Euro-Office.
• Privacy-minded users gain another open-source alternative to Big Tech productivity suites.
• Open-source precedent. The ONLYOFFICE dispute could influence how forks and AGPL-licensed projects are handled everywhere.

Should You Switch?

Not yet. Wait for the official desktop release and early reviews. When it arrives, consider these questions:

1. Compatibility: test your most complex Word, Excel, and PowerPoint files, especially macros and advanced formatting.
2. Your hardware: if you use an Intel Mac, check whether a compatible build becomes available.
3. Your workflow: the biggest benefits come with a Nextcloud server. Without one, LibreOffice remains a mature, free desktop alternative.
4. Compliance: organizations should follow how the licensing dispute develops.
5. Maturity: first desktop releases often have rough edges. Production users may want to wait for early updates.

Frequently Asked Questions

When will the Euro-Office desktop app be available? Nextcloud says it will be available “in the coming weeks” after the September 16, 2026, announcement. No exact date has been given.

Is Euro-Office free? Euro-Office is open-source software. Organizations using it through Nextcloud may pay for hosting or enterprise support, depending on their setup.

Does Euro-Office work on Mac? Yes, but the announced macOS build is for Apple Silicon (ARM64) Macs only. Intel Macs are not on the announced platform list.

Does Euro-Office work offline? Yes. The desktop app will support local files, fonts, and settings, so you can work without a Nextcloud server.

Do I need Nextcloud to use Euro-Office? Not for the desktop app. You can work entirely with local files. Connecting to Nextcloud adds storage on your own server and real-time collaboration.

Is Euro-Office related to ONLYOFFICE? Yes. Euro-Office’s editors are derived from code originally developed by ONLYOFFICE. The two projects are in a public dispute over licensing, attribution, and branding requirements.

How is Euro-Office different from LibreOffice? LibreOffice is a long-established desktop suite from The Document Foundation. Euro-Office is a newer project built on ONLYOFFICE-derived editors, with a strong focus on browser-based collaboration through Nextcloud, now extending to the desktop.

Bottom Line

The desktop app fills the biggest gap in Euro-Office’s lineup. Instead of being just a browser-based editor inside Nextcloud, it is becoming a full office suite that works offline, on your own server, or both, with desktop and web users collaborating in real time.

Open questions remain: the final release date, how its file compatibility compares with Microsoft Office and LibreOffice, and how the ONLYOFFICE licensing dispute plays out. Until the official download arrives, Euro-Office is one of the most interesting open-source office projects to watch.

Sources

1. Nextcloud, Nextcloud Hub 26 Summer release and Euro-Office desktop announcement (September 16, 2026): nextcloud.com/blog
2. Euro-Office official project website: linked from Nextcloud’s announcement
3. Euro-Office desktop source code (GitHub): official Euro-Office GitHub organization
4. ONLYOFFICE, public statement on Euro-Office licensing and Nextcloud partnership (March 2026): onlyoffice.com/blog
5. GNU Affero General Public License v3 (official text): gnu.org/licenses/agpl-3.0.html
6. Nextcloud Office documentation: nextcloud.com/office
7. Collabora Online: collaboraonline.com
8. European Commission, Digital Decade and digital sovereignty: digital-strategy.ec.europa.eu
9. GDPR official text (Regulation (EU) 2016/679): eur-lex.europa.eu
10. U.S. Department of Justice, CLOUD Act resources: justice.gov/criminal/cloud-act-resources
11. ZenDiS, openDesk: opendesk.eu