Not related at all. (Duplicacy != Duplicity) Duplicity is a pretty straight good old-fashioned incremental backup program. Duplicacy on the other hand is hash

Not related at all. (Duplicacy != Duplicity) Duplicity is a pretty straight good old-fashioned incremental backup program. Duplicacy on the other hand is hash-based deduplication (BorgBackup / Attic, Restic etc. are some others). The design of Duplicacy is slightly different from that of e.g. BorgBackup. Duplicacy, as the title says, uses a lock-free approach. BorgBackup and the handful of open source tools in the same spirit use a synchronized approach.