Europe Is Building Its Own Microsoft 365. Should You Be Worried About Switching?

You may have seen headlines recently about Europe launching its own alternative to Microsoft 365. Phrases like “digital sovereignty,” “de-Americanisation,” and “EU cloud independence” have been circulating in the technology press throughout 2026. Governments are making announcements. New platforms are launching. And some businesses are asking whether they should be rethinking their reliance on Microsoft.

The short answer is: not urgently, and not for the reasons you might think. But it is worth understanding what is actually happening, because the conversation reflects something real about how businesses and governments think about technology dependency.

What Has Actually Launched?

Two distinct but related projects arrived in early 2026.

Office.eu launched commercially from The Hague in March 2026, built by a Dutch company called EUfforic Europe BV. It is a cloud productivity platform built around Nextcloud Hub, bundling document editing, email, calendar, and file storage in a single environment. All data is stored in European data centres and is subject exclusively to European law. Pricing is described as comparable to Microsoft 365, though full published pricing was not available at launch. Access is currently by invitation, with broader availability planned through the second half of 2026.

Euro-Office is a separate, open-source project that released a stable 1.0 in June 2026. It is backed by a coalition of more than a dozen European technology organisations, including IONOS, Nextcloud, XWiki, and OpenProject. Rather than a finished consumer product, Euro-Office is primarily a document-editing engine designed to be embedded inside host platforms such as Nextcloud or Proton. It is a fork of ONLYOFFICE (a Latvian productivity suite), a decision that has generated some debate, including concerns that large portions of the underlying codebase still contain Russian-language comments.

Alongside these two launches, the existing field of European alternatives has also grown. Proton, based in Switzerland, has expanded well beyond its encrypted email origins and now offers documents, spreadsheets, VPN, and a password manager. Collabora Online (UK-based, built on LibreOffice technology), ONLYOFFICE (Latvia), and CryptPad (France) all represent mature options that have been in market for years.

Why Is This Happening Now?

The driving force is not dissatisfaction with Microsoft’s products. It is geopolitical anxiety about data sovereignty.

The US CLOUD Act (2018) gives American law enforcement the authority to compel disclosure of data held by US-headquartered companies, regardless of where that data is physically stored. This means that even though Microsoft operates data centres in the Netherlands and Ireland, it remains subject to US legal jurisdiction. European data protection law (GDPR) and the CLOUD Act are, in the strict legal sense, in tension with each other.

That tension has existed for years. What changed in 2025 and 2026 is the political temperature. France announced in April 2026 that it would transition government agency operating systems from Windows to Linux, and had already begun replacing Microsoft Teams and Zoom with a domestic platform. Germany’s Schleswig-Holstein state is migrating tens of thousands of workstations to LibreOffice. Denmark and the city of Lyon have made similar moves. The common thread is that governments are now treating software jurisdiction as a matter of national infrastructure, not just IT procurement preference.

Thirty Years of Microsoft: The Case That Still Stands

It is worth pausing here to put Microsoft’s position in perspective, because the headlines about European alternatives can give a misleading impression of how close any of this is to affecting your business.

Microsoft Office has been the dominant productivity standard for around thirty years. Microsoft 365 has more than 400 million paying users globally. It is not simply a set of applications: it is an ecosystem. Teams, SharePoint, OneDrive, Exchange, Entra ID (formerly Azure Active Directory), Intune, Defender, Purview, and Copilot are all interwoven. The identity and security layer alone, the part that controls who can access what across your organisation, is deeply integrated in a way that no new entrant has come close to replicating as a complete package.

Microsoft has also responded to sovereignty concerns. The EU Data Boundary project, completed in 2024, enables European customers to store and process their data within the EU and EFTA regions. Microsoft has made contractual commitments around data residency, government access transparency, and operational assurance that go well beyond what most organisations would require.

The practical reality of migrating away from Microsoft 365 is also considerably harder than it sounds. Large IT estates are full of dependencies that are invisible until migration day: applications that authenticate against Azure AD, workflows built in Power Automate, spreadsheets with complex macros that do not survive format conversion, Outlook calendar integrations, Teams-based telephony, and so on. Every government that has announced a migration from Windows and Microsoft Office has subsequently discovered that “complete migration” has a very long tail.

What the European Alternatives Actually Offer

That said, it would be wrong to dismiss the new entrants entirely. For specific use cases and specific types of organisation, they are genuinely worth considering.

Document editing and collaboration is the most mature area. ONLYOFFICE and Collabora Online both handle Microsoft file formats (DOCX, XLSX, PPTX) well enough for everyday business use. Complex macros and advanced Excel features are where compatibility tends to break down, but for organisations whose work does not depend on those, the gap is manageable.

Email and calendar is more straightforward than most people expect. Standard protocols (IMAP, CalDAV, CardDAV) are well-established, and migrating email and calendar data from Microsoft Exchange or Google Workspace is a solved problem for competent IT providers.

Compliance and data residency is where the European alternatives have a genuine and defensible advantage for organisations in regulated sectors, public bodies, or any business that handles data under strict sovereignty requirements. If your organisation needs to demonstrate that its data is held under European law with no possibility of foreign-government access, Office.eu or a self-hosted Nextcloud deployment on European infrastructure is a credible answer in a way that Microsoft 365, whatever its contractual commitments, cannot be with complete certainty.

Cost can be a factor for smaller organisations, particularly if self-hosting open-source alternatives is an option. LibreOffice is free. CryptPad’s base version is free. ONLYOFFICE Business starts at around eight euros per user per month, below Microsoft 365 Business Standard.

Where the European alternatives fall short is the breadth of the ecosystem. There is no European equivalent of the integration between Microsoft 365, Azure, Intune, Defender, and Copilot. Organisations that have built their IT operations on that stack would need to replace not just the productivity apps but the identity, security, device management, and AI layers as well. That is a fundamentally different project from replacing Word with Collabora.

The Question Nobody Has Fully Answered

The concern that sometimes surfaces in conversations about Microsoft dependency is a bigger one: what happens if Microsoft were restricted from operating in Europe, or if political or regulatory circumstances changed dramatically enough that continued reliance on a US-headquartered provider became untenable?

It is a reasonable question to ask, even if the scenario itself is currently unlikely. Microsoft is not going to disappear, and a forced separation of European operations from the US parent is a long way from any current regulatory reality. But the question of what your business continuity plan looks like if a major supplier’s service was disrupted is always worth asking, for any supplier, not just Microsoft.

The honest answer is that for most UK SMEs, the dependency on Microsoft 365 is currently manageable because Microsoft’s incentives, contractual obligations, and commercial interests all point in the direction of continued reliable service in Europe. The geopolitical scenarios that would change that calculus are significant enough that they would have far wider consequences than just your email and documents.

What is worth doing, however, is understanding which parts of your IT environment are tightly coupled to Microsoft-specific technology versus which parts use open standards. That knowledge is useful regardless of what happens politically. It helps with negotiation, planning, and resilience.

Our View

The European alternatives launching in 2026 are a genuine development in the market, driven by legitimate concerns about data sovereignty. For organisations in regulated sectors, public bodies, or businesses with specific data residency requirements, they are worth evaluating now.

For the majority of UK SMEs, Microsoft 365 remains the most complete, best-supported, and most deeply integrated productivity and security platform available. The case for switching is not yet compelling for most organisations, and the practical cost and complexity of migration is real.

What is worth doing is making sure you understand your Microsoft dependency clearly enough to have a conversation about it. If that is something you would find useful, we are happy to help you map it out.

Get in touch with the System Force IT team if you would like to talk through your current Microsoft 365 setup, your data residency position, or your options for the future.

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This article reflects the market position as of June 2026. The European productivity software landscape is developing rapidly, and the capabilities of the platforms mentioned are expected to evolve significantly through 2026 and 2027.