[noAnswer]

I use Borg since eight years and it has never let me down. Including a full 8TB disaster restore. It's super resilient to crashes.

When I tested Restic (eight years ago) it was super slow.

No opinion about Kopia, never heard of it.

[liotier]

Same here: my selection boiled down to Borg vs. Restic. I started with Restic because my friends used it and, while it was perfectly satisfactory functionally, found it unbearably slow with large backups. Changed to Borg and I've been happy everafter !

[GCUMstlyHarmls]

What is a "large" backup? Slow to backup locally or slow to backup over a network? (obviously you are not saying its slow without understanding the network is inherently slow, but more along the lines of maybe its network protocol is slow.)

[liotier]

Those were only about 10 TB - home scale, and over SSH across 2 to 10 ms. I was coming from rdiff-backup, which satisfyingly saturated disk writes, whereas I didn't even understand what bottleneck restic was hitting.