10 Best European Alternatives to Microsoft 365 (2026)
Microsoft's subscription suite with Word, Excel, PowerPoint, Outlook on Exchange Online, OneDrive and, on some plans, Teams. Made by Microsoft in Redmond, Washington. It's also known as Office 365, Microsoft Office, MS Office and O365. The European alternatives that replace it best are Nextcloud (Germany) for organisations that want to run the platform themselves, Infomaniak (Switzerland) for small businesses that want one Swiss provider and Proton (Switzerland) for teams that want encrypted email and files in one plan.
European alternatives
10
From 4 countries
Keep data in Europe
2
By default, no setting needed
With a free plan
6
No time limit
Open source
6
Can run on your own servers
Microsoft 365 alternatives from Europe, compared
Best first for someone replacing Microsoft 365. Headcount and founding year come from LeadWave's database; prices, hosting and G2 ratings from each company's own pages and G2, checked in November 2026.
Open-source collaboration platform you run on your own servers or through a hosting partner. Nextcloud Hub covers file sync, online document editing, Talk chat and video calls, mail and calendar.
Compared with Microsoft 365: Covers files, online office editing, mail, calendar and Talk chat in one platform. You or a hosting partner run it, unlike Microsoft's managed cloud.
Organisations that want to run the platform themselves
2. Infomaniak
Swiss email, cloud storage, chat and video meetings
Swiss hosting company whose kSuite bundles email, kDrive storage with online document editing, kChat messaging and kMeet video calls. Runs in its own data centres in Switzerland.
Compared with Microsoft 365: Email, storage with online document editing, chat and meetings from one Swiss provider. Fewer admin and compliance tools than Microsoft 365, and no desktop Office apps.
Headquarters
Geneva, Switzerland
Your data
In Europe
Price
Free
Free plan
Yes
Best for
Small businesses that want one Swiss provider
3. Proton
Encrypted email, files, documents and video meetings
Swiss company behind Proton Mail, Drive, Docs, Sheets and Meet. Mail, files and documents are end-to-end encrypted. Business plans bundle the apps as Proton Workspace.
Compared with Microsoft 365: Encrypted email, calendar, Drive, Docs, Sheets and Meet in one business plan. Its editors are simpler than Word and Excel.
Business plans include migration from Microsoft and Google accounts.
Headquarters
Geneva, Switzerland
Founded
2014
Employees
635
Your data
In Europe
Price
From $3.99/user/month, billed yearly
Free plan
Yes
Best for
Teams that want encrypted email and files in one plan
4. mailbox.org
German business email with office and video add-ons
Email, calendar and contacts run by Heinlein Hosting in Berlin. The Standard plan adds cloud storage, online office editing and video meetings. Ad-free and paid only.
Compared with Microsoft 365: German email and calendar; the Standard plan adds storage, online office editing and video. A low-cost swap for Exchange mail more than for the whole suite.
Headquarters
Berlin, Germany
Your data
Not stated
Price
From €1/user/month, billed yearly
Free plan
No
Best for
Small businesses moving email off Google or Microsoft
5. LibreOffice
Free desktop office suite
Free, open-source desktop suite with a word processor, spreadsheet and presentation app, made by The Document Foundation, a Berlin non-profit. Opens and saves Microsoft Office files. Works offline.
Compared with Microsoft 365: Free desktop replacement for Word, Excel and PowerPoint. No cloud storage, email or co-editing, so it covers only the desktop apps.
Browser-based editor for documents, spreadsheets and slides, built on LibreOffice by Collabora Productivity. Runs on your own servers, usually inside Nextcloud or another file platform.
Compared with Microsoft 365: Replaces Word, Excel and PowerPoint in the browser with a LibreOffice-based editor you host, usually inside Nextcloud. No email or chat of its own.
Headquarters
Cambridge, United Kingdom
Your data
Self-hosted
Price
From €3/user/month
Free plan
Yes
Best for
IT teams adding document editing to their own cloud
7. SoftMaker Office
Desktop office suite built for Microsoft file formats
Commercial office suite from Nuremberg for Windows, macOS, Linux, iOS and Android. Uses Word, Excel and PowerPoint formats natively and runs locally with no forced cloud connection. Sold as a subscription.
Compared with Microsoft 365: Paid desktop suite that uses Word, Excel and PowerPoint formats natively. Desktop and mobile apps only, with no email or shared cloud.
Desktop users who exchange many Word and Excel files
8. Twake Workplace
Open-source mail, chat, drive and calendar
Open-source workplace suite from the French company Linagora, with Twake Mail, Twake Chat, Twake Drive and a calendar. Available as a cloud service or installed on your own servers.
Compared with Microsoft 365: Open-source mail, chat, drive and calendar from French company Linagora, in the cloud or self-hosted. A younger product with a smaller ecosystem than Microsoft 365.
Headquarters
Issy-les-Moulineaux, France
Your data
Self-hosted
Price
On request
Free plan
No
Best for
Organisations wanting an open-source suite from a French vendor
9. openDesk
Open-source workplace suite for public administration
Office and collaboration suite for the public sector, built from open-source parts such as Nextcloud and Element by ZenDiS, a German federal company. Covers mail, files, documents, chat and video calls.
Compared with Microsoft 365: Public-sector suite built from Nextcloud, Element and other open-source parts. Aimed at German and EU administrations, not sold as a self-service plan.
Headquarters
Berlin, Germany
Owned by
Federal Republic of Germany (via ZenDiS) (Germany)
Your data
Self-hosted
Price
On request
Free plan
No
Best for
Public administrations replacing Microsoft 365
10. CryptPad
End-to-end encrypted collaborative documents
Open-source suite for documents, spreadsheets, forms and whiteboards, encrypted end to end in the browser. Built by XWiki SAS in Paris. Use a public instance or run your own.
Compared with Microsoft 365: End-to-end encrypted documents, sheets and forms in the browser. Good for shared documents, but no email and fewer features than Word or Excel.
Headquarters
Paris, France
Owned by
XWiki SAS (France)
Your data
Self-hosted
Price
From €5/month
Free plan
Yes
Best for
Groups that want encrypted shared documents
Why look for a European alternative to Microsoft 365?
Microsoft 365 is headquartered in Redmond, United States and owned by Microsoft (United States). These are the reasons buyers in Europe most often give for looking elsewhere:
Microsoft is a US company, so US law, including the CLOUD Act, applies to it wherever data is stored.
Fair to note: for business customers that sign up in the EU or EFTA, Microsoft stores and processes Microsoft 365 data inside its EU Data Boundary.
Some organisations want open-source software they can run themselves, or a vendor under European law only.
How this list was made
A company counts as European if it's headquartered in Europe: the EU, the EEA, Switzerland, the UK, or elsewhere in geographic Europe, never Russia or Belarus. Headquarters means where it's run from, not a registered office. Companies founded in Europe but headquartered elsewhere today are listed separately, and a non-European owner is always named.
Each company was checked against its own legal notice, pricing page and data-processing terms, and its G2 page. Headcount, funding and founding year come from LeadWave's database of SaaS companies. No company paid to be listed or ranked.
It depends on what you use Microsoft 365 for. Nextcloud (Germany) for organisations that want to run the platform themselves, Infomaniak (Switzerland) for small businesses that want one Swiss provider and Proton (Switzerland) for teams that want encrypted email and files in one plan. All 10 on this page are headquartered in Europe; the table compares their hosting, prices and G2 ratings.
No. Microsoft 365 is headquartered in Redmond, United States and owned by Microsoft (United States). As a US company it falls under US law, including the CLOUD Act, wherever it stores your data.
Nextcloud, Infomaniak, Proton, LibreOffice, Collabora Online and CryptPad have a free plan with no time limit.
Infomaniak and Proton store customer data in Europe by default.
Yes: Nextcloud, LibreOffice, Collabora Online, Twake Workplace, openDesk and CryptPad. Open-source tools can also be self-hosted on your own servers in Europe.
Proton documents an import from Microsoft 365; the details are under each one below.
For business customers that sign up in the EU or EFTA, Microsoft commits to storing and processing Microsoft 365 customer data inside its EU Data Boundary. Microsoft is still a US company subject to US law.
LibreOffice and SoftMaker Office are German desktop suites that open Word and Excel files. For editing in the browser, Collabora Online, Nextcloud, Infomaniak and Proton offer document and spreadsheet editors.
Yes. Under commitments the European Commission made binding in September 2025, Microsoft offers Microsoft 365 and Office 365 without Teams at a lower price.
