It seems a very similar product, also offering zfs snapshots, but I like the fact rsync.net snapshots are immutable: you can browse them but there is no way to delete them without contacting support (and the CEO once posted he would review every such request). It makes me feel more confident about my backups if someone got hold of the cached credentials from my backup software.

Nice to read they've baked this in. It is a barrier that can let one recover even after attacks from insiders.

Your link is dead for me. Maybe you wanted to link to this? https://www.hetzner.com/storage/storage-box

Hetzner is throttling bandwidth after traffic exceeds ~5x the storage capacity while rsync.net doesn't seem to. Hetzner also only supports a very small number of snapshots in total while rsync.net supports more per day.

I don't think Hetzner and rsync.net are really competing with each other. rsync.net's focus is more on business customers, while Hetzner targets private customers.

I tried to view the link. Got a site not found error.

Also, Borg backup.

rsync.net was the first storage provider to support Borg out of the box and also has a special tier for Borg users (which was later expanded for restic and some others iirc).

I also like that their Europe location is in Switzerland. I think it's useful for a number of reasons to store critical data in more than one jurisdiction.