European Alternatives to Microsoft 365

For millions of organizations across the globe, Microsoft 365 has become the default productivity stack. Outlook handles email, Teams powers communication, OneDrive stores files, and the familiar Office apps take care of documents and spreadsheets. That tight integration is exactly what makes it so popular — and exactly what makes it so hard to replace.

But in Europe, the conversation is shifting. Concerns around data sovereignty, GDPR compliance, and over-reliance on US-based cloud providers are pushing organizations — governments, businesses, and institutions alike — to seriously ask: is there a credible European alternative to Microsoft 365?

The honest answer is nuanced. No single European product replicates the entire Microsoft 365 suite out of the box. But a growing ecosystem of mature, privacy-respecting European tools can be combined to cover every function Microsoft 365 offers — sometimes even better. If you’re also exploring whether a full European alternative to Microsoft is realistic, it’s worth understanding what each component looks like in practice.

What Does Microsoft 365 Actually Cover?

Before exploring replacements, it helps to break down exactly what Microsoft 365 provides:

• Word, Excel, PowerPoint — document creation and editing
• Outlook and Exchange — email, calendar, and contacts
• Microsoft Teams — chat, video calls, and collaboration
• OneDrive — personal and shared cloud storage
• SharePoint — document management and team sites
• Entra ID / Azure AD — identity and access management

Each of these has at least one strong European counterpart. Let’s go through them.

European Alternatives by Category

Office Apps: Documents, Spreadsheets, and Presentations

For organizations that need to replace Word, Excel, and PowerPoint, two European options stand out:

• LibreOffice (Germany) — A fully open-source office suite that handles word processing, spreadsheets, and presentations. It’s already widely used by European governments and public institutions, and it’s free to deploy at scale.
• Proton Drive (Switzerland) — Beyond just storage, Proton Drive includes document editing and collaboration features with end-to-end encryption baked in from the ground up.

Email and Calendar: Replacing Outlook and Exchange

Email is often the hardest part of a Microsoft 365 migration, especially for organizations relying on Exchange’s calendar and contacts sync. These European providers are up to the task:

• Proton Mail (Switzerland) — One of the most well-known privacy-first email services, with end-to-end encryption, a built-in calendar, and contact management. Hosted in Switzerland under strict data protection laws.
• Infomaniak Mail (Switzerland) — A professional-grade email and calendar platform that forms part of Infomaniak’s broader kSuite productivity environment.
• Kopano Groupware (Netherlands) — An open-source groupware solution with Exchange-like functionality, including Outlook client support. A strong fit for organizations that need deep calendar and contact integration.

For a broader look at privacy-respecting email options, check out this overview of European alternatives to Microsoft Outlook and Hotmail.

Chat and Video: A European Answer to Microsoft Teams

Teams has become deeply embedded in how modern organizations communicate. Replacing it requires something that handles both real-time messaging and video calls — ideally within a single platform.

Infomaniak kChat and kMeet (Switzerland) are probably the closest European equivalent to what Teams offers. kChat provides team messaging, channels, file sharing, and project-oriented workspaces. kMeet adds video conferencing and online meetings on top of that. Together, they function as a unified communication platform — all hosted in Switzerland and subject to European data protection regulations. This combination is part of the broader kSuite and integrates naturally with Infomaniak’s other tools.

Other strong options in this space include:

• Element (Matrix) (UK) — An open-source, decentralized messaging platform built on the Matrix protocol. Supports chat, voice, and video. A popular choice for governments and organizations that want full control over their infrastructure.
• Nextcloud Talk (Germany) — Integrated directly into Nextcloud, this tool combines chat and video with the rest of the Nextcloud collaboration suite.
• Proton Meet (Switzerland) — An upcoming video meeting solution from Proton, continuing their expansion into a full privacy-first productivity ecosystem.

If messaging is a priority for your organization, it’s also worth exploring European alternatives for secure messaging beyond just the workplace context.

Cloud Storage and Document Collaboration: OneDrive and SharePoint Replacements

For file storage and team collaboration, several European platforms offer polished, full-featured experiences:

• Proton Drive (Switzerland) — Privacy-focused cloud storage with end-to-end encryption. Well suited for individuals and smaller teams.
• Nextcloud Hub (Germany) — A comprehensive self-hosted or managed collaboration platform combining file storage, office editing, chat, calendar, and more. One of the most complete all-in-one European options available.
• Infomaniak kDrive (Switzerland) — Cloud storage with real-time collaboration capabilities, tightly integrated with the rest of the kSuite toolset.

Identity and Access Management: Replacing Azure AD / Entra ID

This is often the most overlooked component when organizations plan a Microsoft 365 migration. Entra ID (formerly Azure Active Directory) manages user authentication and access control across the entire suite. Two strong European-aligned options exist:

• Keycloak (open-source) — A widely adopted open-source identity and access management solution that supports SSO, OAuth2, and SAML. Free to deploy and operate on your own infrastructure.
• Univention (Germany) — A full identity management and directory platform designed specifically for organizations seeking a European-hosted Active Directory alternative.

Putting It All Together: A Sample European 365 Stack

Here’s what a practical, fully European Microsoft 365 replacement could look like:

• Email and calendar: Proton Mail or Infomaniak Mail
• Chat and video meetings: Infomaniak kChat and kMeet
• Cloud storage and collaboration: Nextcloud Hub or Infomaniak kDrive
• Office documents: LibreOffice (desktop) or Proton Drive (online editing)
• Identity and access management: Keycloak or Univention

This is not a theoretical exercise — organizations across Europe are already running setups like this in production. The tooling has matured significantly over the past few years.

Is Making the Switch Worth It?

There are real tradeoffs involved in moving away from Microsoft 365. Integration between tools requires more planning. User training may be necessary. And the seamless experience of an all-in-one platform like Microsoft 365 comes with a switching cost when you move to a best-of-breed stack.

But for organizations where data sovereignty, GDPR compliance, or reducing dependency on US-based cloud infrastructure is a priority, those tradeoffs are increasingly worth it. The European alternatives covered here are no longer second-tier options — they’re production-ready, actively maintained, and in many cases backed by organizations with strong privacy track records.

A broader overview of European alternatives across many software categories can also help put your options in context as you plan a migration.

Final Thoughts

No single European product replaces Microsoft 365 in one shot — but that’s not really how the best software environments are built anyway. A thoughtfully assembled combination of tools from Proton, Infomaniak, Nextcloud, LibreOffice, and others can cover every function Microsoft 365 offers, while keeping your data in Europe and out of reach of US surveillance laws.

For organizations serious about digital sovereignty, this isn’t a compromise — it’s a better-architected solution.