Bacula is described as 'Set of computer programs that permit managing backup, recovery, and verification of computer data across a network of computers of different kinds' and is a Backup Client in the backup & sync category. There are more than 50 alternatives to Bacula for a variety of platforms, including Windows, Linux, Mac, Android and Web-based apps. The best Bacula alternative is FreeFileSync, which is both free and Open Source. Other great apps like Bacula are Duplicati, rsync, FastCopy and Acronis True Image.
Synkron is an application for folder synchronisation and folder-backups that allows you to configure your synchronisations in detail. Despite having many features, the user interface of Synkron is very user-friendly and easy to use.
DirSync Pro is a small, but powerful utility for file and folder synchronization. Java JRE 1.7 or above is needed to run DirSync Pro.
Areca Backup is a file backup software which can be run on Windows or Linux. It creates backup copies (which can be encrypted and compressed) of your files and stores them on external drives, USB keys, FTP servers, supporting incremental, differential and full backups.
Bareos is a 100% open source fork of the backup project Bacula . Bareos is in development since late 2010, it has a lot of new features: Certified for SUSE, Red-Hat, Univention, Oracle Linux, AIX , Solaris, BSD with lots of Plugins for NetApp...
100% open source with all features in community version. Nice webUI
Almost everyone thinks Bareos is a great Bacula alternative.
LuckyBackup is an application that backs-up and/or synchronizes any directories with the power of rsync.
ViceVersa does File Synchronization, File Replication, File Backup and File Comparison. It can automatically verify data using a CRC32 checksum.
Proxmox Backup Server is an enterprise backup solution, for backing up and restoring VMs, containers, and physical hosts. By supporting incremental, fully deduplicated backups, Proxmox Backup Server significantly reduces network load and saves valuable storage space.
This free software allows you to backup your data to external drives, network locations, FTP servers and cloud storages.
BackupPC is a high-performance, enterprise-grade system for backing up Linux, WinXX and MacOSX PCs and laptops to a server's disk. BackupPC is highly configurable and easy to install and maintain.
JFileSync is a Java application used to synchronize directories of two different file systems. For instance, you want to synchronize a set of directories on your laptop with a set of corresponding directories on your workstation. English and German UI.
Backer is a visual front end to the rsync command. It allows the user to select multiple folders and back them up to multiple locations. It stores your backup settings for you so that all your backups can be run easily using a single button click.
Slovakia
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Austria
It's a fork, but even more open.