GoodSync is a very famous, simple but user-friendly and reliable automatic file/folder backup/sync utility. It can quickly and automatically analyze, compare and then sync or backup your files/folders among a variety of local or online storage spaces on multiple devices or platforms.
Through the use of innovative synchronization algorithm, GoodSync has become a leader in the industry. In GoodSync, data synchronization is absolutely not just a simple copy, but compares the content of synchronizing files first (to filter out the duplicate files) to reduce unnecessary work and save time. Therefore, GoodSync’s sync/backup work is more efficient and reliable, and won’t produce excess files (whether it is a two-way or one-way synchronization). It just can completely eliminate redundant files.
If you already know FreeFileSync is the best free and open source file/folder sync tool, then you should know GoodSync is the best commercial one.
Ranking most well-known sync utilities, it would be like this:
GoodSync (commercial) -> FreeFileSync (free) -> SyncToy (free) -> Allway Sync (commercial) -> Compare Advance (commercial).