Nextcloud

Key Features

• Self-hosted deployment giving full data sovereignty with support for on-premises and cloud infrastructure
• Integrated office suite via Nextcloud Office (LibreOffice-based) for real-time collaborative document, spreadsheet, and presentation editing
• End-to-end and server-side encryption with brute-force protection, 2FA, and machine-learning-based login protection
• Extensible ecosystem of over 200 first- and third-party apps including Calendar, Contacts, Mail, and video calls