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Independently verified · Quarterly re-audit
EU VETTED
Alternatives to

European alternatives to Microsoft 365.

Microsoft cloud productivity suite. Direct CLOUD Act exposure.

ALTERNATIVES
4
CLOUD-ACT · NONE
2
WITH BSI C5
0
FREE TIER
4

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TOP PICKS

Which are the closest Microsoft 365 alternatives?

Ordered by feature parity and migration friction, which is weighted higher than feature breadth.

Proton Drive
Switzerland · Founded 2014
EU-SOVEREIGN
★ #1 PICK

Swiss zero-knowledge encrypted cloud (Proton AG, non-profit-foundation-controlled), 11,496 owned servers, ISO 27001 + SOC 2, 5 GB free.

Public DPA Sub-processors Open source
FROM
€4/mo
CLOUD ACT
NONE
View profile →
Nextcloud
Germany · Founded 2016
EU-SOVEREIGN
★ #2 PICK

German open-source content-collaboration platform (Nextcloud GmbH, Stuttgart, 2016); fully self-hostable + managed Nextcloud One hosted in DE.

Public DPA Sub-processors Open source
FROM
€6/mo
CLOUD ACT
NONE
View profile →
OnlyOffice
Latvia · Founded 2009
EU-BASED
★ #3 PICK

Riga-based Latvian office suite (Ascensio System SIA), AGPLv3 self-hostable + DocSpace cloud; complex post-2023 Singapore+UK+Russian-origin ownership chain.

Public DPA Sub-processors Open source
FROM
—
CLOUD ACT
MINOR
View profile →
SIDE-BY-SIDE

How do the 4 European alternatives to Microsoft 365 compare?

All 4 alternatives, benchmarked against Microsoft 365.

Feature comparison

Beyond compliance: how these alternatives compare on the capabilities you actually use day to day.

Feature Proton Drive Nextcloud OnlyOffice Collabora Online
Free storage 5 GB
Paid storage (from) 200 GB
Max file size Unlimited Unlimited
Photo sync Yes Yes
File versioning Yes Yes
Link sharing Yes Yes
Self-hostable Yes Yes
Platforms iOS macOS Windows Android Web iOS macOS Windows Android Linux Web
Real-time collaboration Yes Yes
Databases / tables No No
Public publishing Yes
Version history Yes Yes
Granular permissions Yes
Offline mode Yes Yes
AI assist Yes Yes
WHAT YOU'RE LEAVING
What are you leaving behind with Microsoft 365?

Listed for transparency. Every product on this page is benchmarked against this baseline.

Microsoft 365 US-incorporated

Microsoft cloud productivity suite. Direct CLOUD Act exposure.

US-based
OWNERSHIP
US-OWNED
CLOUD ACT
DIRECT
HOSTING
Likely AWS · US
SCHREMS II
Default SCC + supp.
METHODOLOGY

How we verified each row above.

For every product we read the public DPA, sub-processors document, hosting region declaration, and corporate ownership records. Each is timestamped. Signals are editorial, re-verified quarterly. We never accept self-attestation.

Reviewed by the EU Vetted editorial team · Editorial guidelines

Read methodology →