European Alternatives to Microsoft 365
Microsoft’s productivity suite covering Office apps, mail, storage and Teams. Below are 8 alternatives from companies headquartered in the United Kingdom, the Netherlands, the Czech Republic, Switzerland, Germany, Latvia and France. 4 of them keep data in the EU only, and 2 have a free plan.
Headquartered in Europe
Every company listed here has its headquarters in the EU, EEA, UK or Switzerland, not just a data centre there.
Data location you can check
The pricing table shows whether each one keeps data in the EU only, offers an EU region, or does not say.
Outside the US CLOUD Act
US providers can be ordered to hand over data held in their European data centres. A European company with no US parent or US operations is outside that reach.
Compare Microsoft 365 Alternatives
| Company | Headquarters | Data Residency | Founded | Pricing | Open Source | Employees | Funding | Replaces | Website |
|---|---|---|---|---|---|---|---|---|---|
Collabora Online Open Source | Cambridge, United Kingdom | — | 2013 | Self-hosted core with paid support subscriptions | ✅ Yes | ~100 | Private open-source company | Google Docs, Microsoft 365 | Visit |
| Groningen, Netherlands | 🇪🇺 EU Only | 2026 | Paid business workspace plans with the full suite included | ❌ No | N/A | Independent, no outside VCs | Google Workspace, Microsoft 365, Gmail | Visit | |
| Prague, Czech Republic | 🇪🇺 EU Available | 2001 | Paid business plans for hosted or private deployments | ❌ No | N/A | Private company | Google Workspace, Microsoft 365, Outlook | Visit | |
| Geneva, Switzerland | 🇪🇺 EU Only | 1994 | Free tier, paid seat plans for business teams | ❌ No | ~250 | Private company | Google Workspace, Microsoft 365 | Visit | |
| Berlin, Germany | 🇪🇺 EU Only | 2014 | Paid plans from low monthly seat pricing | ❌ No | ~30 | Bootstrapped (Heinlein Group) | Google Workspace, Microsoft 365, Outlook | Visit |
Microsoft 365 Alternatives: Pricing and Hosting Compared
Starting prices are the lowest paid plan each vendor publishes. Check the vendor's pricing page before you buy, as plans change.
| Alternative | Country | Free plan | Paid plans | Open source | Data residency |
|---|---|---|---|---|---|
| Collabora Online | United Kingdom | No | Custom quote | Yes | Not stated |
| Email.eu | Netherlands | No | Not published | No | EU only |
| IceWarp | Czech Republic | No | Not published | No | EU region available |
| Infomaniak kSuite | Switzerland | Yes | Not published | No | EU only |
| Mailbox.org | Germany | No | Not published | No | EU only |
| ONLYOFFICE | Latvia | Yes | Not published | Yes | EU region available |
| Open-Xchange | Germany | No | Custom quote | No | EU region available |
| Wimi | France | No | Not published | No | EU only |
8 European Alternatives
Collabora Online
UK- and EU-focused collaborative office suite built on LibreOffice for sovereign document editing inside self-hosted stacks.
Dutch sovereign business workspace with EU-hosted mail, calendar, docs, drive, meetings, and chat for compliance-sensitive teams.
Czech business email and collaboration suite with mail, calendars, chat, meetings, storage, and documents in one workspace.
Swiss business email and productivity suite with custom domains, storage, meetings, and strong sovereign-hosting positioning.
German business email and office suite with IMAP, custom domains, and broader productivity tooling.
Latvian collaborative office suite for documents, spreadsheets, presentations, and workspace-style team collaboration.
German productivity suite that pairs email, files, calendar, and collaborative documents for teams wanting a broader sovereign workspace around office workflows.
French sovereign collaborative suite with mail, drive, docs, tasks, calendars, chat, and meetings for teams replacing Google Workspace.
What to Check Before Switching from Microsoft 365
Where your data will be stored
4 of the 8 alternatives here say they keep data in the EU only. IceWarp, ONLYOFFICE and Open-Xchange offer an EU region alongside others, so choose it explicitly when you set up the account. Collabora Online does not state where data is stored. Ask before you move anything sensitive.
How you can try it
Infomaniak kSuite and ONLYOFFICE have a free plan, so you can run a real test before cancelling Microsoft 365. Collabora Online and Open-Xchange sell on custom quotes only, which usually means a sales call before you can try it.
Open source
Collabora Online and ONLYOFFICE release their software or models under an open licence, which makes it easier to self-host, inspect what runs, and move again later.
Security certifications
Certifications we have confirmed on the vendor’s own site: Collabora Online (ISO 27001); Wimi (ISO 27001, SecNumCloud). If your procurement requires one, check the others directly.
What you need to bring from Microsoft 365
List the data, templates and integrations you rely on in Microsoft 365, then confirm each one can be exported and that the alternative can import it or offers an API to rebuild it.
Frequently Asked Questions
- What are the European alternatives to Microsoft 365?
- We list 8 companies headquartered in Europe that replace Microsoft 365: Collabora Online (United Kingdom), Email.eu (Netherlands), IceWarp (Czech Republic), Infomaniak kSuite (Switzerland), Mailbox.org (Germany), ONLYOFFICE (Latvia), Open-Xchange (Germany) and Wimi (France).
- Is there a free European alternative to Microsoft 365?
- Infomaniak kSuite and ONLYOFFICE have a free plan. Free plans usually come with limits on usage or features, so check them against how you use Microsoft 365 today.
- Which Microsoft 365 alternatives keep data in the EU?
- Email.eu, Infomaniak kSuite, Mailbox.org and Wimi keep data in the EU only. IceWarp, ONLYOFFICE and Open-Xchange let you choose an EU region.
- Is there an open-source European alternative to Microsoft 365?
- Yes: Collabora Online and ONLYOFFICE.