Duplicity is an open source project that can be used with different types of storage (I use them with OpenStack Object Storage instead of S3). You can host you

Duplicity is an open source project that can be used with different types of storage (I use them with OpenStack Object Storage instead of S3). You can host your own backups if you want (supports ftp, sftp, ... check the docs: http://duplicity.nongnu.org/duplicity.1.html http://duplicity.nongnu.org/duplicity.1.html), but Tarsnap is an hosted solution.