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Sync.com vs Sia: catalog facts
Sync.com	Sia
Freemium A small free tier is available. More storage requires a paid plan.	Freemium The Sia Storage app includes 50 GB free; pricing beyond that is not stated.
Windows, macOS, Android, iOS, Web	Android, iOS
Zero-knowledge encryption applies to everything by default, not as an add-on Sharing links with passwords, expiry and download limits	Files encrypted and sharded across many independent hosts No central operator holding your data
No Linux client Zero-knowledge means a forgotten password can mean permanent data loss	Mostly aimed at a technical and builder community Desktop clients and pricing details are not described on the homepage
Downloadable app, Hosted service	Downloadable app, Hosted service
Closed source	Open 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 October 1, 2026

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