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Dropbox vs Synology Drive: catalog facts
Dropbox	Synology Drive
Freemium A small free tier is available. More storage and features require a paid plan.	Free Included free for Synology NAS owners; it requires Synology hardware.
Windows, macOS, Linux, Android, iOS, Web	Windows, macOS, Android, iOS, Web, Self-hosted
The most mature and reliable sync engine, with clients everywhere Smart sync keeps large libraries usable on small disks	Keeps files on your own NAS instead of a public cloud Desktop sync and backup plus mobile apps
The free tier is only a few gigabytes and caps linked devices Files are stored unencrypted from the provider's point of view	Only runs on Synology NAS hardware Closed source
Downloadable app, Hosted service	Downloadable app, Self-hosted
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is 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 23, 2026

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