Nextcloud

Open-source content collaboration platform that keeps file sync, sharing, and team productivity under your own infrastructure. Combines file storage with real-time editing, video conferencing, calendar and mail, and workflow automation while retaining full data ownership on-premises or in your chosen cloud.

Trusted by governments, universities, and enterprises including German federal administration, TU Berlin, and EU research networks. Nextcloud differentiates from proprietary alternatives by running entirely on your servers, with no metadata or data flowing to third parties, and by offering a LibreOffice-based office suite, SIP-compatible video calls, and optional local AI assistant.

Key capabilities:

• Self-hosted file sync and share with web, desktop, and mobile clients
• Nextcloud Talk for audio, video, and chat with SIP federation
• Groupware with calendar, contacts, and mail integration
• Collaborative document editing via Nextcloud Office
• Flow and Tables for process automation and structured data
• Optional local AI assistant with context-aware chat and document generation

Organizations deploy Nextcloud for digital sovereignty and compliance, remote collaboration without lock-in, and education or public-sector use cases where data must stay on-premises. IT teams integrate it with existing identity providers, LDAP, and S3-compatible storage backends.