Bup

Very efficient backup system based on the git packfile format, providing fast incremental saves and global deduplication (among and within files, including virtual machine images).

Free software · bup.github.io

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What Bup’s own pages say

What it says it doesVery efficient backup system based on the git packfile format, providing fast incremental saves and global deduplication (among and within files, including virtual machine images). bup.github.io

Each value is a quote AirStack found on the product’s own pages, read 2026-11-05. A missing field means AirStack has not found it on its pages.