Seafile

Seafile is an open-source file hosting software that provides self-hosted cloud storage and collaboration capabilities. It is designed to scale from personal use to large organizations, prioritizing fast and reliable file synchronization, data integrity, and efficient bandwidth usage. Seafile can be deployed on-premises or hosted in the cloud and is available as a Community Edition and a paid Professional/Enterprise edition.

The software organizes data into libraries, which act as synchronized collections of files. Clients keep the local copy in sync with the server, with a delta-based synchronization engine that uploads only changed blocks. This improves efficiency when working with large datasets. Access controls allow libraries and files to be shared with individuals or groups, and selective sync lets users choose which libraries to synchronize on each device.

Seafile provides multiple interfaces and clients: native apps for Windows, macOS, and Linux, mobile apps for iOS and Android, a web interface, and WebDAV access. A REST API enables automation and integration with other systems. Sharing features include link-based sharing, optional password protection, expiration dates, and granular permission settings.

Editions and licensing: The Community Edition is open-source and self-contained; the Professional/Enterprise Edition adds features such as centralized administration, LDAP/Active Directory integration, single sign-on, auditing, and formal support options.

History and usage: Seafile was first released in 2012 by Seafile Ltd. It has been adopted by individuals, small teams, educational institutions, and enterprises seeking self-hosted alternatives to public cloud storage, with deployments across various industries.