What is Euro-Office?
European cloud vendors have assembled a shared initiative to deliver an office suite that runs on European infrastructure and answers to European governance. Euro-Office gives organizations a browser-based environment for documents, spreadsheets, and presentations that looks and behaves much like Microsoft 365. The project is built on an open-source core, meaning its code is transparent and modifiable. For anyone searching for a euro office alternative to the dominant American productivity clouds, this suite represents a coordinated effort to shift control back to regional stakeholders.
The interface mirrors the layout that millions of workers already know. Toolbar placement, menu labels, and shortcut conventions follow patterns established by Microsoft Office over decades. That familiarity reduces retraining costs for public-sector bodies and private companies alike. Behind the visible surface, the document format support covers.docx,.xlsx,.pptx, and the open ODF formats, so file exchanges with existing partners remain smooth.
Real-time collaboration is included from day one. Multiple users can edit the same document simultaneously, with changes visible to all participants in the moment. This feature alone makes the suite a practical replacement for Google Docs in environments where data location and governance matter more than convenience.
Who is behind Euro-Office?
The project is backed by a consortium of European cloud and collaboration companies. The list includes Ionos, Nextcloud, EuroStack, XWiki, OpenProject, Soverin, Abilian, BTactic, Open-Xchange, and Office.eu. Each participant brings a specific piece of the puzzle: storage, sync, team communication, document management, or hosting infrastructure. This is not a one-vendor experiment but a coalition with overlapping user bases across European enterprises and public administrations.
Ionos is one of Europe’s largest hosting providers. Nextcloud runs on tens of thousands of servers worldwide and is widely adopted in German and French schools and government agencies. XWiki provides enterprise wiki and document collaboration tools. OpenProject handles project management. The collective investment signals that these vendors see a durable market for a sovereign office stack, not a temporary promotional effort.
According to Achim Weiss, Ionos CEO, the geopolitical shifts of the past year have created a clear demand for a reliable, Microsoft-compatible office solution that is governed in Europe. The consortium’s composition reflects that conviction: every backer is headquartered in a European Union member state or closely aligned country, and the legal and operational control stays within European borders.
When and where can I get it?
Euro-Office version 1.0 will be released on June 9 from the project’s public GitHub repositories. Anyone with a GitHub account can inspect the source code, fork it, or submit contributions. The repositories will contain the web editor components for documents, spreadsheets, and presentations, along with the backend integration hooks.
Importantly, the suite does not ship as a standalone installer. It arrives as an integrated component inside existing European collaboration ecosystems. The first product to include it will be Nextcloud Hub 26 Spring release, where Euro-Office will serve as the in-browser editor for shared documents. For administrators, this means no extra wiring is needed: enable the office module inside Nextcloud, and users immediately see the editor when they open a document.
Ionos managed Nextcloud customers will be able to install Euro-Office shortly after June 9. Later this summer, Ionos plans to fold it into its broader Nextcloud Workspace offering. XWiki expects to integrate the suite in the fourth quarter of 2025, and Office.eu has also committed to a rollout. By the end of the year, a wide range of enterprise and public-sector users should have access through their existing platforms.
How is it different from LibreOffice?
Many people assume that any open-source office suite must be built on LibreOffice, but Euro-Office takes a different path. The project is a fork of the open-source core provided by Ascensio System SIA’s OnlyOffice. The codebase, the rendering engine, and the file-compatibility layer are all derived from OnlyOffice, not from LibreOffice. This distinction matters because the two codebases have different strengths and different licensing terms.
OnlyOffice was designed from the start as a web-first editor with real-time collaboration as a primary feature. LibreOffice originated as a desktop application and gained web capabilities later through projects such as Collabora Online. The underlying architecture differs in how it handles concurrent editing, document conversion, and memory management. Euro-Office inherits OnlyOffice’s approach, which means its collaboration features are native rather than retrofitted.
The licensing also differs. OnlyOffice uses a hybrid model: the source code is available under AGPL-3.0, but commercial distributions use a separate license. Euro-Office operates under the same AGPL-3.0 terms, which require that modified versions distributed as a network service must also release their source code. That condition aligns with the transparency goals of the consortium.
What digital sovereignty problem does it solve?
Governments and regulated industries face a growing conflict between their data governance obligations and the terms imposed by US-based SaaS vendors. When a city hall stores citizen records in a cloud operated by an American corporation, that data falls under the jurisdictional reach of US law, including the Clarifying Lawful Overseas Use of Data Act. For many European public authorities, this arrangement has become unacceptable.
Euro-Office addresses that problem by keeping the entire software stack under European corporate control. The code is open, so any procurement team can audit it. The hosting can be done on servers located within the organization’s own country. The consortium members are subject to European data protection regulations including GDPR, and none of them are bound by US surveillance statutes in the same way that American parent companies would be.
Frank Karlitschek, Nextcloud CEO, described the initiative as taking responsibility for a vital piece of digital infrastructure. He noted that Europe has had the technical building blocks for years but lacked an initiative to bundle them into a comprehensive solution. Euro-Office provides that bundle. Organizations that deploy it gain tools they can trust to be transparent, durable, and managed within Europe.
Can it be used outside Europe?
The consortium’s messaging focuses on European digital sovereignty, but the code itself carries no geographic restrictions. The repositories on GitHub are open to the global community. Anyone can download the source, build the suite, and deploy it anywhere in the world. The AGPL-3.0 license permits use in commercial and non-commercial settings as long as the source-code disclosure obligations are met.
For organizations outside Europe that are also seeking a euro office alternative to Microsoft 365 or Google Workspace, the software functions identically regardless of the continent on which the servers sit. The collaboration features, file format support, and interface are independent of the deployment location. The consortium has not indicated any plans to gate access by IP range or contractual territory restrictions.
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Global contributions are explicitly welcomed. A developer in Brazil or Japan can submit bug fixes, translations, or feature enhancements through the standard GitHub pull-request workflow. Over time, this could broaden the language coverage and platform compatibility beyond the initial European focus, making the suite more useful for international deployments.
5 Open Source Alternatives to Microsoft Office
The office-suite landscape includes several mature open-source projects, each with a different philosophy and target audience. Below are five notable options that offer a genuine alternative to proprietary office software.
Euro-Office
As detailed in the sections above, Euro-Office is the newest entrant. It combines a OnlyOffice-derived editing engine with tight integration into European cloud platforms such as Nextcloud and XWiki. The suite’s distinguishing advantage is its consortium backing, which provides a governance structure that is explicitly European and sovereignty-focused. Organizations already using Nextcloud or Ionos hosting can enable it with minimal configuration. The release date of June 9 marks the beginning of its public availability, and the integration roadmap extends through the end of 2025.
LibreOffice
LibreOffice is the most widely deployed open-source desktop office suite. It is developed by The Document Foundation and has been in active development since 2010. The suite includes Writer, Calc, Impress, Draw, Base, and Math. It supports the OpenDocument Format natively and can also read and write Microsoft Office files with reasonable fidelity. LibreOffice runs on Windows, macOS, and Linux. For organizations that need a desktop application rather than a web-based editor, LibreOffice remains the standard choice. Its community edition is free, and enterprise support is available from companies such as Collabora and CIB.
OnlyOffice
OnlyOffice is the upstream project from which Euro-Office forked. It provides web-based editors for text documents, spreadsheets, and presentations, with real-time collaboration built in. The suite is available in a self-hosted community edition under AGPL-3.0 and in commercial editions with additional features such as document signing and CRM integration. OnlyOffice is developed by Ascensio System SIA, a company registered in Latvia. Its document compatibility with Microsoft Office formats is widely regarded as among the best of any open-source office suite. Organizations that want maximum alignment with Euro-Office’s codebase but prefer to stay on the mainstream release track may find OnlyOffice a better fit.
Apache OpenOffice
Apache OpenOffice traces its roots to the original StarOffice code acquired by Sun Microsystems in 1999. It was donated to the Apache Software Foundation in 2011 and is now maintained by a volunteer community. The suite includes Writer, Calc, Impress, Draw, Base, and Math. Its development pace has slowed in recent years, and many users have migrated to LibreOffice. However, Apache OpenOffice still sees regular security releases, and its user interface remains familiar to anyone who used earlier versions of OpenOffice.org. It serves as a low-overhead option for basic office tasks on legacy hardware.
Collabora Online
Collabora Online is a enterprise-grade web-based office suite built on the LibreOffice engine. It is developed by Collabora Productivity Ltd., a company with engineering centers in the United Kingdom, Germany, and other locations. The suite provides browser-based editors for documents, spreadsheets, and presentations, with real-time collaboration features. It integrates with many popular content-management and file-sync platforms including Nextcloud, ownCloud, and Seafile. The enterprise edition includes support contracts, SLA guarantees, and features such as document watermarking and access control. For organizations that prefer the LibreOffice rendering engine but need a web interface, Collabora Online is the natural choice.
Frequently Asked Questions
Is Euro-Office free to use or does it require a subscription?
Euro-Office itself is open-source software released under the AGPL-3.0 license, so there is no licensing fee for the software itself. However, the suite is distributed as an integrated component inside collaboration platforms such as Nextcloud and Ionos Workspace. Those platforms have their own pricing models, which may include free community editions or paid enterprise tiers with support and additional features. Organizations that already run a supported platform can enable Euro-Office without extra per-seat charges.
What happens to my existing Microsoft Office documents when I switch to Euro-Office?
Euro-Office’s editing engine inherits OnlyOffice’s file-compatibility layer, which can open and save.docx,.xlsx,.pptx files alongside the OpenDocument Format. In practice, complex documents with heavy formatting, embedded macros, or ActiveX controls may render differently. The consortium has prioritized compatibility with standard business documents such as reports, letters, spreadsheets, and presentations. Organizations should test a representative sample of their document inventory before committing to a full migration. The familiar interface reduces the training burden, but file-format testing is still a necessary step.
Can Euro-Office be self-hosted on my own servers, or must I use a provider?
Yes, the code is available from public GitHub repositories, so any organization with appropriate infrastructure can build and deploy Euro-Office on its own hardware. The project does not currently publish pre-built containers or one-click installers, so self-hosting requires familiarity with the build toolchain and the target platform’s integration API. The consortium’s primary distribution strategy is through partner platforms such as Nextcloud, which handle installation and update logistics. Self-hosted deployments will need to manage those responsibilities independently.
Euro-Office represents a coordinated attempt to build a productivity stack that answers to European governance while remaining open to global adoption. Its release on June 9 gives organizations a new option in their evaluation of open-source office suites, and its integration into established platforms lowers the barrier to trial. Whether deployed by a city council in France, a university in Germany, or a company in any other region, the suite provides a transparent, auditable foundation for document editing and collaboration.
