What it is

Seafile is an open source cloud storage system written in C and positioned as a self-hosted alternative to Dropbox and Google Drive. It organizes files into libraries, each of which can be synced separately, encrypted with a user chosen password, and shared between users or groups. The project lives in the self-hosted file sync and document management ecosystem, where it combines storage, collaboration, knowledge management, and metadata features.

It solves the gap between simple file syncing and usable team document organization. Many storage tools copy files, but they do not always provide conflict handling, selective sync, encrypted libraries, group sharing, structured file properties, or views that turn files into work items. Seafile treats libraries as the sync unit and adds metadata, wikis, collaborative editing, and sharing controls around the stored files.

Key capabilities

• It syncs libraries separately and supports selective sync for any folder, so users can choose which cloud folders are present on a device.
• It handles file conflicts based on history rather than timestamp, transfers only content deltas, and resumes interrupted transfers.
• It supports sync with two or more servers and sync with existing folders, allowing clients to connect to multiple storage locations or map cloud libraries to local directories.
• It provides folder sharing between users or groups, password protected download links, upload links, and version control.
• It offers a drive client that exposes cloud files through a virtual drive, so users can access files while syncing on demand.
• It includes extensible file properties, hierarchical tags, and views such as table, Kanban, gallery, map, and statistics views.
• It integrates OnlyOffice, Collabora, SeaDoc, Wiki, and Excalidraw for office editing, documents, knowledge bases, and whiteboards.

Who uses it and how

• Teams use it as a self-hosted Dropbox or Google Drive replacement for syncing project libraries, sharing folders, and collecting files through upload links.
• Users who need privacy protection use encrypted libraries or client side encryption with the desktop client, so selected content is protected with a user chosen password.
• Knowledge workers use the built-in Wiki and SeaDoc features to maintain internal documentation and collaborate on documents inside the same system that stores the files.

Getting started

The README points to the Seafile manual for building and running the server, and it notes that each component has its own source repository.

When to use it — and when not to

Seafile fits teams that want a self-hosted alternative to Dropbox or Google Drive and also need libraries, encryption, metadata views, wikis, and collaborative editing. Self-hosters must operate the server, web interface, clients, and integrations themselves. The README does not state a hosted option, and the separate component repositories mean the deployment is assembled from multiple parts.