Top Alternatives to FreeFileSync

Double Commander is a cross platform open source file manager with two panels side by side.

Syncthing replaces proprietary sync and cloud services with something open, trustworthy and decentralized.

rsync is a utility for efficiently transferring and synchronizing files across computer systems, by checking the timestamp and size of files.

TeamDrive is a software manufacturer that has specialized in creating solutions for secure collaborative work over the Internet.

SyncBack is software which allows backing up and synchronizing files to the same or different drives, to different media (CD, DVD, Flash, zip), or to a remote server.

SyncToy is a freeware tool in Microsofts PowerToys series that provides an easy-to-use graphical user interface for synchronizing files and folders in Windows versions XP, Vista and 7. It is written using Microsofts .NET framework and uses the Microsoft Sync Framework.

GoodSync is a backup and file synchronization program. It is used for synchronizing files between two directories.

SparkleShare is open-source client software that provides cloud storage and file synchronization services.

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 distributed under the terms of the GPL v2.

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 hosts (or different disks on the same host), modified separately, and then brought up to date by propagating the changes in each replica to the other.

Allway Sync is backup and file synchronization software that allows backing up and synchronizing files to the same or different drives, to different media (CD, DVD, Flash, zip), or to a remote server.

InterPlanetary File System (IPFS) is a protocol designed to create a permanent and decentralized method of storing and sharing files.

Bvckup 2 is a backup software for Microsoft operating systems.

Syncovery will copy your files the way you need it, Back up your data and synchronize PCs, Macs, servers, notebooks and online storage space.

Robocopy is a command-line directory and/or file replication tool.

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

Create Synchronicity is a powerful and lightweight open source backup and synchronization program, available in many languages.

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

PureSync is a Windows program to synchronize files and folders, and to do backups automatically in the background.

Qtd Sync is a backup client and server.

Uranium Backup is a software backup for Windows supporting VMware ESXi, Hyper-V, tape and SQL backups.

ViceVersa is a free file synchronization software utility for Windows.

Bacula is an open-source, enterprise-level computer backup system for heterogeneous networks.

FBackup is a data backup platform.