Arq Backup vs BackupPC

Arq Backup has no write-up on Specifiction yet; its figures are above.

BackupPC backs up Linux, Windows, and macOS computers to a server’s disk. It is open-source software distributed under the GPL, with a free plan. No software needs to be installed on each computer; its documentation describes backup methods using SMB, rsync, tar, and FTP. Identical files found in different backups are stored once, and optional compression can reduce storage use while compressing only new files. Administrators can use the web interface to check logs, configuration, and status. Users can start or cancel backups, browse files, and restore them directly or download them as ZIP or tar archives. Scheduling settings cover parallel backups, full and incremental backups, and system-wide or per-computer configuration. BackupPC also supports laptops that connect intermittently or use dynamic IP addresses, with configurable email reminders when a computer has not been backed up recently. The project lists announcement, user-support, and developer mailing lists. Its listed latest release is version 4.4.0, dated June 20, 2020. The documentation says it is not intended to recreate a failed disk exactly.