Best European Microsoft 365 Alternatives (2026)

LibreOffice

🇩🇪

by LibreOffice

Free office suite – the evolution of OpenOffice. Compatible with Microsoft .doc, .docx, .xls, .xlsx, .ppt, .pptx. Updated regularly, community powered.

Proton Workspace

🇨🇭

by Proton Workspace

Proton Workspace delivers end-to-end encrypted email, calendar, cloud storage, and productivity tools to help scalable business while safeguarding data. Protect every part of work with encryption.

OnlyOffice

🇱🇻

by OnlyOffice

ONLYOFFICE offers a secure online office suite highly compatible with MS Office formats. Connect it to your web platform for document editing and collaboration or use as a part of ONLYOFFICE Workspace.

Collabora Online

🇬🇧

by Collabora Online

Collabora Online is a document editing suite that allows collaborative editing of text documents, spreadsheets, presentations, and graphics. It can be integrated into various platforms and accessed via desktop, mobile, or online applications. The suite supports a wide range of document formats and offers customizable integrations.

CryptPad

🇫🇷

by CryptPad

CryptPad is a secure, collaborative office suite designed to protect your privacy while enabling seamless teamwork. With end-to-end encryption, CryptPad ensures that only you and your collaborators can access your documents, making it an ideal choice for privacy-conscious users. Its real-time collaborative editing feature allows multiple users to work on documents simultaneously, enhancing productivity without compromising security. Key features include GDPR-compliant data handling, customizable templates, and version history tracking, all hosted within the EU to ensure data sovereignty. CryptPad is open source and community-driven, offering transparency and flexibility to its users. It is perfect for individuals, teams, and organizations that prioritize data privacy and need a reliable platform for document creation and sharing. CryptPad's pricing model includes a free tier with optional paid plans for additional storage and features, making it accessible for both personal and professional use.

Infomaniak kSuite

🇨🇭

by Infomaniak

Complete collaborative office suite from Switzerland. Includes email, calendar, contacts, video conferencing, cloud storage (kDrive), and online document editing. A privacy-focused alternative to Google Workspace.

Anytype

🇨🇭

by Anytype

Create notes, tasks, databases, and chats that only you can access. Your data stays on your device — fully owned, secure, and private. Free to start.

Cryptee

🇪🇪

by Cryptee

Cryptee is a privacy-focused, end-to-end encrypted platform for documents, notes, and photo storage, based in Tallinn, Estonia. It uses client-side AES-256 zero-knowledge encryption, meaning even Cryptee cannot access your data. Features include a rich document editor with Markdown support, code highlighting, LaTeX, and file attachments. Data is stored in the EU with disaster backups in Switzerland and Sweden. Best suited for individuals who prioritize privacy for personal documents and photos rather than team collaboration.

Nuclino

🇩🇪

by Nuclino

Nuclino is a German collaborative knowledge base and wiki software. Combines documents, project management, and team collaboration in a simple, fast interface. Features real-time collaboration, graph view, and clean design. GDPR compliant with servers in EU.