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Tarsnap vs Carbonite: catalog facts
Tarsnap	Carbonite
Paid Prepaid usage billing at $0.25 per GB-month stored and $0.25 per GB transferred, with no…	Paid Annual plans for one computer, with discounted first-year prices and a 30-day money-back…
macOS, Linux, Command line	Windows, macOS
Client-side encryption with keys only you hold Deduplication uploads only changed data	Unlimited cloud storage on personal plans Runs automatically after setup
Command line only, with no graphical interface No native Windows client, only Cygwin or WSL	Personal plans cover only one computer Video backup is automatic only on higher tiers
Downloadable app, Hosted service	Downloadable app, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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