What can replace Microsoft 365.
8 European products that cover Microsoft 365 fully or in part. None of them is a clone — where something is missing, it says so.
8 entries
InfomaniakCH
A Geneva provider with mail, calendar, kDrive, video meetings and hosting — entirely in its own Swiss data centres.
SwitzerlandProvenEffort: Mediumwww.infomaniak.com Replaces: Google Workspace · Microsoft 365
LibreOfficeDE
The office suite of Berlin's Document Foundation, ODF by default, running locally with no account and no network.
EU / EEAProvenEffort: MediumOpen sourceSelf-hostableCatchComplex Excel macros and exact Word layouts do not always survive the trip. If you exchange documents with outsiders, test the switch on a real corpus first.
www.libreoffice.org Replaces: Microsoft 365
Nextcloud HubDE
Files, calendar, contacts, chat, video and office in one package you can run yourself — the most widely deployed European counterpart to Microsoft 365.
EU / EEAProvenEffort: MediumOpen sourceSelf-hostableCatchPerformance is a function of how you run it. An under-provisioned install feels slow, and there is nobody but you to hand that on to.
nextcloud.com Replaces: Microsoft 365 · Google Workspace · Dropbox
ONLYOFFICE DocsLV
The office suite with the best OOXML fidelity in the open camp — Word and Excel files usually survive the round trip intact.
EU / EEASolidEffort: MediumOpen sourceSelf-hostableCatchThe vendor, Ascensio System SIA, is registered in Latvia; its development history and roots reach back to Russia. For public bodies and critical infrastructure that is a point to check.
www.onlyoffice.com Replaces: Microsoft 365 · Google Docs
Open-Xchange (OX App Suite)DE
Groupware out of Cologne that runs underneath a large share of European providers' mailboxes.
EU / EEAProvenEffort: MediumOpen sourceSelf-hostablewww.open-xchange.com Replaces: Microsoft 365 · Google Workspace
openDeskDE
The sovereign workplace built by Germany's ZenDiS: Nextcloud, Open-Xchange, Collabora, Element and Univention bolted into one package.
EU / EEASolidEffort: LargeOpen sourceSelf-hostableCatchAimed at public administration. Companies will miss things like a spreadsheet layer at Microsoft's level and a dense partner network — both still forming.
opendesk.eu Replaces: Microsoft 365 · Google Workspace
Univention Corporate ServerDE
A Bremen-built platform for directory, user management and app delivery — the Active Directory replacement in many schools and public bodies.
EU / EEAProvenEffort: LargeOpen sourceSelf-hostablewww.univention.de Replaces: Microsoft 365 · Microsoft Entra ID
Collabora OnlineGB
Collaborative document editing in the browser, built on LibreOffice, usually run as part of Nextcloud or openDesk.
United KingdomProvenEffort: MediumOpen sourceSelf-hostableCatchHeadquartered in the United Kingdom. Because you run the software yourself, that touches the support contract, not your data.
www.collaboraonline.com Replaces: Microsoft 365 · Google Docs
Every field, filter and catch lives in the full directory. Not a recommendation and not a review. A list with evidence, so you can draw up a shortlist. Ownership and headquarters change — verify whatever matters to you before you sign.
Data as of August 2026