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Tarsnap vs rustic: catalog facts
Tarsnap	rustic
Paid Prepaid usage billing at $0.25 per GB-month stored and $0.25 per GB transferred, with no…	Free The open-source application is available without a license fee.
macOS, Linux, Command line	Windows, macOS, Linux
Client-side encryption with keys only you hold Deduplication uploads only changed data	Uses the established restic repository format
Command line only, with no graphical interface No native Windows client, only Cygwin or WSL	It is younger than restic and compatibility should be checked for your workflow.
Downloadable app, Hosted service	Downloadable app
Closed source	Open source
License not stated	License not stated
Account needed	Not stated if an account is 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 22, 2026

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