Seafile

Seafile is an open-source file hosting and synchronization software. It enables users to privately store, sync, and share files across devices by deploying their own server, either on-premises or in the cloud. Its core functionality revolves around creating a self-hosted alternative to services like Dropbox or Google Drive. Key features include reliable file syncing, team collaboration with granular permissions, file versioning, and built-in document editing.

It emphasizes performance and data privacy, as all data remains under the user's control. Organizations and individuals seeking a secure, scalable, and private file sync and share solution, particularly where data sovereignty is critical, would find Seafile of significant interest.