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Best European alternatives to ONLYOFFICE in 2026

We found 3 EU-built alternatives to ONLYOFFICE — GDPR-native, with verified data sovereignty and transparent rankings. No pay-to-win.

3 EU-built alternatives to ONLYOFFICE
Zetaoffice

Zetaoffice

Project Management
EU Based

ZetaOffice brings LibreOffice to the browser, offering Writer, Calc, and Impress for document editing, spreadsheets, and presentations. It supports self-hosting or CDN deployment with full data control and API integration.

DE
Collabora Online

Collabora Online

Project Management
EU Mentions

Collabora Online is a LibreOffice-based web office suite enabling real-time collaborative editing of documents, spreadsheets, and presentations. It runs in any modern browser, supports major file formats, and can be self-hosted or deployed in the cloud to keep data private.

GB
I

Infomaniak Ksuite

Project Management
EU Mentions

kSuite is a Swiss collaborative workspace combining email, calendar, file storage, team chat, video meetings, and real-time document editing. It prioritizes privacy, GDPR compliance, and sustainability with all data hosted in Switzerland on 100% renewable energy.

CH

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