Online backups for the truly paranoid
Tarsnap is a secure, efficient online backup service:
- Encryption: your data can only be accessed with your personal keys.
- Source code: the client code is available.
- Deduplication: only the unique data between your current files and encrypted archives is uploaded.
Tarsnap runs on UNIX-like operating systems (BSD, Linux, macOS, Cygwin, etc).
Tarsnap uses a prepaid model based on actual usage:
|Storage:||250 picodollars / byte-month of encoded data
($0.25 / GB-month)
|Bandwidth:||250 picodollars / byte of encoded data
($0.25 / GB)
There are no other fees — Tarsnap has no fixed costs or minimum monthly fees.
Why use Tarsnap?
Consider a typical backup scenario:
- Alice begins a backup, which takes a complete snapshot of her files.
- Tarsnap automatically finds the unique data within her files.
- Alice pays less than $5/month.
- Alice's data is secure.
Latest Tarsnap release
Tarsnap 1.0.39 (July 29, 2017)
Changes in this version compared to 1.0.38:
tarsnap1.0.38 (but not earlier versions) would exit with an assertion failure after successfully creating an archive containing a file with "last modified" times prior to January 1st, 1970.
tarsnap1.0.38 and earlier could crash if instructed to archive the contents of corrupt
ararchives (via the
tarsnap1.0.38 and earlier could crash if passed an invalidly encrypted key file.
You can see all of the changes between 1.0.38 and this version in our tarsnap git repository.