seafile

Seafile is a cloud storage platform focused on fast file synchronization and sharing. Its delta sync technology ensures rapid transfers even for large files, supporting efficient team file collaboration.

• Fast delta sync transferring only changed portions of files for speed with large files
• Client-side encryption at the library level where servers cannot decrypt data
• File versioning with change history and restoration to previous versions
• Online office integration with LibreOffice Online for collaborative document editing
• LDAP and Active Directory integration for enterprise authentication
• Audit logging for detailed tracking of file access, sharing, and modifications

Built with Python and C, Seafile is easily self-hosted on Linux servers or Docker. It serves as a Dropbox alternative focused on file sync performance and security for privacy-conscious organizations.