# European open-source digital sovereignty initiatives

> Developing situation record from CLSTR: https://clstr.news/situations/european-open-source-digital-sovereignty-initiatives
> Updated: 2026-10-26T07:39:17.000Z. Sources: 11. Developments: 3.

Efforts to establish European digital sovereignty through open-source productivity software have progressed through new software releases and corporate collaborations.

In September 2026, Euro-Office, a European open-source office suite developed by a consortium including IONOS and Nextcloud, announced the launch of a standalone desktop application for Windows, Linux, and macOS. Part of the Nextcloud Hub 26 update, the application is intended to provide a sovereign alternative to Microsoft 365 by allowing local file editing with server synchronization. Nextcloud CEO Frank Karlitschek stated the app provides a “real alternative” for organizations seeking data control without relying on non-European providers. However, the project has faced scrutiny because it is a fork of ONLYOFFICE, which has been linked to Latvian registration and previous licensing disputes.

By October 2026, the movement expanded as the openDesk digital workspace, developed by Germany’s Center for Digital Sovereignty (ZenDiS), experienced a surge in demand. Having already sold over 200,000 licenses, the platform’s strategic importance was previously highlighted by the International Criminal Court in The Hague, which adopted the suite in 2025 to mitigate risks regarding US sanctions. 

To manage this growth and target international markets, six manufacturers—Collabora Productivity, Element, Nordeck, Open-Xchange, Univention, and XWiki—formed a joint venture called Open Productivity Software GmbH. This entity aims to market openDesk to businesses and critical infrastructure operators, supported by partners such as Adfinis, the msg-group, and Smile, who provide consulting and system integration.

## Timeline

### 2026-10-26: OpenDesk experiences surge in demand as German providers form joint venture

German-developed OpenDesk is seeing massive demand as a Microsoft 365 alternative. Six open-source firms have formed a joint venture to expand its reach into the corporate and critical infrastructure sectors.

2 sources. https://clstr.news/cluster/opendesk-experiences-surge-in-demand-as-german-providers-form-joint-venture

### 2026-10-12: Open Productivity Software GmbH formed to market openDesk

Six open-source manufacturers have formed Open Productivity Software GmbH to market and support the openDesk digital workspace for businesses and critical infrastructure providers.

3 sources. https://clstr.news/cluster/open-productivity-software-gmbh-formed-to-market-opendesk

### 2026-09-21: Euro-Office to launch desktop application for Windows, Linux, and macOS

Euro-Office is launching a desktop application for Windows, Linux, and macOS to provide a sovereign, open-source alternative to Microsoft Office, integrated with the Nextcloud platform.

6 sources. https://clstr.news/cluster/euro-office-to-launch-desktop-application-for-windows-linux-and-macos

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Cite as: European open-source digital sovereignty initiatives. CLSTR, https://clstr.news/situations/european-open-source-digital-sovereignty-initiatives