Proton Drive vs Sync.com Comparison

• 200 GB, Drive Plus for 12 months: $47.88 every 12 months
• 500 GB, Proton Unlimited for 12 months: $119.88 every 12 months
• 2 TB for up to 2 users, Proton Duo for 12 months: $179.88 every 12 months
• 3 TB for up to 6 users, Proton Family for 12 months: $287.88 every 12 months

• 1 TB, Personal 1TB monthly: $16 a month
• 1 TB, Personal 1TB for 1 year: $144 billed yearly
• 5 TB, Solo 5TB monthly: $32 a month
• 5 TB, Solo 5TB for 1 year: $336 billed yearly
• Unlimited, Personal Unlimited monthly: $54 a month
• Unlimited, Personal Unlimited for 1 year: $540 billed yearly

File contents, file and folder names and thumbnail previews are encrypted on your device with keys generated there (OpenPGP, Curve25519). Proton can see creation and modification times, permissions, the username that uploaded each file and the size of the encrypted file. The web app receives its encryption code from Proton's servers every time it loads.

Sync says files and file names are encrypted on your device with 256-bit AES. File size, type, creation time and the creator of a shared file are not encrypted. On paid plans, email password reset is on by default and keeps a copy of your account key that Sync's automated systems can use; turning it off deletes the copy. Previews of Office and other formats, media streaming, editing in Microsoft's editor, faster web downloads over 100 MB and links without Enhanced privacy are processed outside end-to-end encryption. The web panel decrypts files in your browser with code that Sync serves on every visit.

Penetration tests of the web app (September to October 2021), the Android app with its API (July to August 2022) and the iOS app (August to September 2022); no Drive audit report for the Windows or macOS apps is published

Operated by Proton AG, Route de la Galaise 32, 1228 Plan-les-Ouates, Geneva. Proton says it owns its server hardware in Switzerland and Germany; the Drive security page does not say which of the two countries holds Drive files. Proton discloses data only on a binding order from Swiss authorities.

Sync.com Inc. is registered in Ontario and contracts with users outside the US; users in the US contract with Sync.com Corp., a Delaware company. The terms are governed by Ontario and Canadian law unless local law requires otherwise. Files are stored in Canada by default, or in the US for accounts in the US data region; account data is also kept with service providers in the US.

Proton AG's primary shareholder is the non-profit Proton Foundation, based in Geneva. Proton states it has no venture capital investors.

Sync says it was founded in Toronto in 2011 by Thomas Savundra, Suhan Shan and Darius Antia and has more than 2 million users.

Free plan: up to 10 versions of each file, kept for up to 7 days. Paid plans: up to 200 versions of each file, kept for up to 10 years, with adjustable settings.

Earlier versions and deleted files can be restored for 30 days on the free plan, 90 days on Personal 1TB, 180 days on Solo 5TB and 365 days on Personal Unlimited. They do not count toward your storage.