Euro-Office adds encrypted email provider Tuta ahead of public release

Tuta has announced that it has joined the Euro-Office project, a European initiative developing an open-source, cloud-based office suite designed to reduce dependence on Microsoft and Google services.

The announcement has been released just one week before the launch of Euro-Office's first stable release, signaling growing industry support for the sovereignty-focused platform.

The announcement confirms that the encrypted email provider will collaborate with existing Euro-Office partners. The project is backed by the EuroStack movement and aims to provide European organizations and consumers with an alternative productivity platform focused on privacy, transparency, and digital sovereignty.

Euro-Office is supported by a growing coalition of European technology companies, including IONOS, Nextcloud, Tuta, XWiki, OpenProject, Soverin, Abilian, BTactic, Open-Xchange, and Office.eu. The initiative seeks to deliver a fully featured office environment for creating, sharing, and collaborating on documents while avoiding reliance on large US technology providers.

Founded in Germany, Tuta is known for its end-to-end encrypted email and calendar services. The company has increasingly positioned itself as a privacy-focused alternative to mainstream cloud providers, recently expanding its ecosystem with products such as Tuta Mail, Tuta Calendar, and Tuta Drive.

According to Tuta co-founder and CEO Matthias Pfau, the company sees Euro-Office as a promising path toward a sovereign office platform that combines usability with strong privacy protections. Pfau highlighted the project's European development model and fully open-source approach as key factors behind Tuta's decision to participate.

The Euro-Office platform is based on a fork of OnlyOffice, an open-source office suite known for its web-first architecture and browser-based document editing capabilities. Project developers say the decision to fork OnlyOffice was driven by its modern design and ability to deliver a seamless cloud experience.

While projects such as LibreOffice and Collabora Online remain important open-source productivity tools, Euro-Office aims to provide a more tightly integrated cloud platform for organizations seeking sovereign digital infrastructure.

The announcement comes amid growing efforts across Europe to reduce dependence on foreign cloud and software providers. Concerns about data sovereignty, compliance requirements, and geopolitical uncertainty have led governments and businesses to explore locally controlled alternatives for critical digital services.

Nextcloud founder and CEO Frank Karlitschek said the project has progressed faster than expected, attributing the accelerated development to growing momentum and the addition of new partner organizations. The expanding membership suggests that interest in European-built productivity platforms is increasing as businesses and public-sector organizations seek alternatives to established office ecosystems.

IONOS CEO Achim Weiss also emphasized demand for a Microsoft-compatible office solution that can meet sovereignty requirements without sacrificing familiarity. According to Weiss, Euro-Office aims to offer users a familiar interface for working with documents, presentations, and spreadsheets while keeping infrastructure and governance under European control.

The first stable release of Euro-Office is scheduled for next week. Its success will likely depend on its ability to deliver compatibility, performance, and ease of use while maintaining the privacy and sovereignty principles that have attracted supporters.