I have used Arq for way over a decade. It does incremental encrypted backups and supports a lot of storage providers. Also supports S3 object lock (to protect against ransomware). It’s awesome!

How is the performance? For me it takes Arq over an hour just to scan my files for changes.

(Arq developer here) By default Arq tries to be unobtrusive. Edit your backup plan and slide the “CPU usage” slider all the way to the right to make it go faster.