Open Source

FreeFileSync is a free open source backup software which helps you compare and synchronize files and folders on Windows, Linux and macOS.

Duplicati

Open Source

Duplicati is a backup tool, not a file sync tool.

Unison

Open Source

Unison is a file-synchronization tool for OSX, Unix, and Windows. It allows two replicas of a collection of files and directories to be stored on different ho…

DirSync Pro

Open Source

DirSync Pro is an open source synchronization and backup utility for Windows, Linux, macOS, and all other operating systems that run Java.

CrashPlan

Freemium

CrashPlan backup software offers the best way to back up and store personal, business & enterprise data securely - offsite, onsite & online in the Cloud.

Synkron

Open Source

Synkron is a multiplatform Qt application designed for synchronizing two or more folders. It is written in C++ and uses the Qt4 libraries. Synkron is distribu…

ChronoSync

Commercial

ChronoSync is a macOS application for periodic backups, bootable drive clones and folder synchronizations.

BackupPC

Open Source

BackupPC is a free disk-to-disk backup software suite with a web-based frontend. The cross-platform server will run on any Linux, Solaris, or UNIX-based serve…