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Seafile vs Dropbox: catalog facts
Seafile	Dropbox
Freemium The community edition is free and open source. The Professional edition is paid.	Freemium A small free tier is available. More storage and features require a paid plan.
Windows, macOS, Linux, Android, iOS, Self-hosted	Windows, macOS, Linux, Android, iOS, Web
Block-level sync and deduplication make it fast with large libraries Per-library client-side encryption, and a drive client that streams on demand	The most mature and reliable sync engine, with clients everywhere Smart sync keeps large libraries usable on small disks
Some features are reserved for the paid Professional edition Self-hosting requires a database and careful upgrade handling	The free tier is only a few gigabytes and caps linked devices Files are stored unencrypted from the provider's point of view
Self-hosted, Downloadable app	Downloadable app, Hosted service
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.