I also back up multiple hosts to the same repository, which actually results in insane storage space savings. One thing I'm missing though is being able to specify multiple repositories for one snapshot such that I have consistency across the multiple backup locations. For now the snapshots just have different ids.

Last time I used restic a few years ago, it choked on not so large data set with high memory usage. I read Borg doesn't choke like that.

And that's what I did myself. Organically it grew to ~200 lines, but it sits in the background (created a systemd unit for it, too) and does its job. I also use rclone to store the encrypted backups in an AWS S3 bucket

I so much forget about it that sometimes I have to remind myself to test it out if it still works (it does).

                           Original size      Compressed size    Deduplicated size
    All archives:                2.20 TB              1.49 TB             52.97 GB

Cheap, reliable, and almost trouble-free.

I've been mostly using restic over the past five years to backup two dozen servers + several desktops (one of them Windows), no problems so far, and it's been very stable in both senses of the word (absence of bugs & unchanging API — both "technical" and "user-facing").

https://github.com/restic/restic

The important thing is to run periodic scrubs with full data read to check that your data can actually be restored (I do it once a week; once a month is probably the upper limit).

  restic check --read-data ...

https://www.rsync.net/signup/order.html?code=experts

https://www.borgbase.com

(the code is NOT a referral, it's their own internal thingy that cuts the price in half)