I use backblaze b2 and https://github.com/garethgeorge/backrest

Backrest is by far the best restic manager I’ve found, easy webUI, with built in support for healthchecks.

Backrest (restic) is what I use after constant duplicati problems. Kopia is also a good option.

Duplicati is ok with tiny backup sets, but give it multiple TB of data and it chokes and constantly has errors requiring expensive rebuilds.

Basically everything. Self hosting doesn’t rely on public access.