Seafile

What is Seafile?

Seafile is a file sync and collaboration server built for performance on large libraries. Instead of uploading whole files it syncs in blocks, which keeps incremental sync fast even with tens of thousands of documents, and it keeps full version history. It supports desktop and mobile clients, shared libraries, and group permissions, making it a practical self-hosted replacement for a team drive.

Best for

Teams or families that need reliable two-way sync with version history

Why choose Seafile

Seafile is the file-sync tool for people whose libraries were dragged down by everything else they tried. Its block-level synchronisation means that changing one slide in a large presentation transfers only the changed data, and it keeps working quickly as a library grows into the tens of thousands of files and hundreds of gigabytes. Add per-library sharing, real permission controls and version history, and it becomes a credible answer for a small team that needs sync they can host themselves.

Replaces

• Dropbox
• Google Drive
• OneDrive

Key features

• Block-level sync that stays fast on big libraries
• File versioning and trash recovery
• Shared libraries with per-user permissions
• Desktop, mobile and drive clients

What to watch out for

Seafile is heavier to run than a plain synchronisation tool: it uses a database in addition to its block storage, and there are two editions — the community edition and a paid professional one with some features reserved. Its design also means your files are not stored as plain files on the server, so recovery from a server-side failure means using the tool's own mechanisms, not simply copying files from a folder. Getting the storage layout and the database backed up together is essential and often overlooked.

How to deploy

• Docker
• Linux packages

Getting started

Use the official Docker Compose deployment and decide your data layout before uploading anything, because server-side storage is not portable in a casual way. Configure the database backup first and verify a restore early — with Seafile the database and the block storage are two halves of the same truth. Test the client on two machines with a small library and edit a large file to see block-level sync working before committing real data. Read the upgrade instructions for your edition before every version change; skipping steps here has broken more installations than anything else.

Typical setup

It is usually deployed on a server with more storage than a typical home box, using the Docker Compose stack, with the database and the block storage directories treated as a single unit for backup purposes. Teams create shared libraries per project with per-user permissions, and desktop clients keep working copies on each machine. Because the server does not store plain files, a working database backup is what stands between a disk failure and real trouble.

Who should look elsewhere

Overkill if you just need to sync a few folders, and it will cost you maintenance effort for features you never open. Because the server does not store plain files, it is also a bad fit for anyone who expects to recover data by plugging the disk into another computer — the tool's own mechanisms are the only way back.

Project health

• GitHub stars: 15,293
• Last code push: 2026-09-18
• Open issues: 100
• Status: actively developed

Figures pulled from the GitHub API and refreshed periodically.