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Best European alternatives to Microsoft 365 in 2026

We found 1 EU-built alternative to Microsoft 365 — GDPR-native, with verified data sovereignty and transparent rankings. No pay-to-win.

1 EU-built alternative to Microsoft 365

onlyoffice

Project Management

EU Based

ONLYOFFICE is an open-source office suite offering document, spreadsheet, and presentation editors. It supports real-time collaboration and integrates with popular cloud platforms and DMS solutions.

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