Re:Tarsnap performance issues in late March, most of April
by pquerna on Tuesday May 05, 2015 @11:43PM
(#9496493)
tarsnap is not open source:
"While the Tarsnap code itself has not been released under an open source license, some of the "reusable components" have been published separately under a BSD license"
"While the Tarsnap code itself has not been released under an open source license, some of the "reusable components" have been published separately under a BSD license"
http://www.tarsnap.com/oss.html
The source code for tarsnap is available to view, so you could audit/inspect it yourself, but it is not under an open source license.