Indeed it is better than incrementals, being close to the behaviour of rsync which can also symlink to previous backups. Surprisingly, tarsnap is much easier to

Indeed it is better than incrementals, being close to the behaviour of rsync which can also symlink to previous backups. Surprisingly, tarsnap is much easier to use than rsync: my perl script to work out what rsync should be doing is about 30 lines long, whereas the one to kick off tarsnap is about 3 lines. As for VC, I can see why sometimes that's not always the best option, especially if the founder has to give up control in return for funds. However, I think it would be great to see more projects like this on HN, grounded in technical expertise and solid business needs.