Open source software based backup; Multi-platforms supported (Windows, Linux, FreeBSD, Unix,) Licensed per device/computer; Free open source backup agent

Let us have a look at a few open-source backup software packages. All of these provide support for Unix, Linux, Windows, and Mac OS, although to varying degrees. Amanda is the oldest of the open-source backup software packages. Duplicati is a free open source backup software for Windows. It is a web-based software through which you can make online backup as well as local backup.The online backup can be made either by using Standard Protocols (FTP, Swift, SFTP, WebDAV) or Proprietary Services (Amazon Cloud, Dropbox, Google Drive, Mega, Microsoft One Drive, etc.). According to Source Forge statistics (rank and downloads), Bacula is by far the most popular open source backup software tool for full system backup. It has 2,5 million downloads and thousands of contributors worldwide.

The Open Source Backup Software Amanda is the world's most popular open source backup and recovery software. Amanda allows system administrators to set up a single server to back up multiple hosts to a tape- or disk-based storage system over the network.

Best open source network data backup and recovery software. Bacula Systems’ SQL Server backup software delivers especially good performance via a modern highly reliable architecture and offers you the following SQL Server backup tool capabilities: Full and Differential SQL Server backup; Incremental (Log) level support; Database level backup

UrBackup is an easy to setup Open Source client/server backup system, that through a combination of image and file backups accomplishes both data safety and a fast restoration time. File and image backups are made while the system is running without interrupting current processes.

Offsite backup solutions are typically built around a client software program that runs on a schedule, typically once a day, and usually at night while computers aren't in use. The backup program typically collects, compresses, encrypts, and transfers the data to the remote backup service provider's servers, or off-site hardware.