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Back In Time vs Grsync: catalog facts
Back In Time	Grsync
Free The software is free under its open-source licence. Hosting, hardware and external…	Free Free and open source under the GPL.
Linux	Windows, macOS, Linux
Unchanged files are hard-linked rather than copied, so each snapshot looks complete while using very little extra disk…	Saved sessions turn a long rsync command into a one-click job Simulation mode shows exactly what would change before running
It is Linux-only and inherits rsync's weaknesses, including no built-in encryption and slow handling of very large file…	Exposes only a subset of rsync's options Interface is GTK and looks dated
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0	License: GPL-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.