Best European alternatives to Microsoft 365 in 2026

Onlyoffice

Project Management

Verified

ONLYOFFICE Docs is a powerful European online office suite designed for businesses of all sizes looking for a secure, flexible, and cost-effective alternative for document workflows. It enables teams to create, edit, and collaborate on text documents, spreadsheets, presentations, PDFs and fillable forms in one unified workspace. With real-time co-editing, commenting, version history, document comparison, built-in communication features and an integrated AI assistant compatible with all popular AI tools and providers, ONLYOFFICE Docs helps teams work faster and more efficiently across departments and locations. Built with business needs in mind, ONLYOFFICE Docs combines broad format support, cross-platform access, and strong customization options with a security-first approach. The suite easily integrates into any web-based application, and some successfull integation examples include ownCloud, Nextcloud, Redmine, Odoo, Moodle, WordPress, Nuxeo, HumHub, Jira, Confluence, and more.

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.

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.