When comparing Microsoft SyncToy vs Seafile, the Slant community recommends Seafile for most people. In the question“What are the best personal file-syncing solutions?” Seafile is ranked 6th while Microsoft SyncToy is ranked 30th. The most important reason people chose Seafile is:
Seafile community edition is licensed under GPLv2 with source code available on [GitHub](https://github.com/haiwen/seafile).
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Three methods
SyncToy has three methods available: Synchronize, Echo and Contribute. Synchronize will change both the source and the target folder. Echo will not change the source folder. Contribute is the safest option, if source files are deleted, they won't be deleted in the target folder.
Pro Free and open source
Seafile community edition is licensed under GPLv2 with source code available on GitHub.
Pro Client-side encryption
All files are transferred with AES 128 bit encryption.
Cons
Con Requires maintenance
You have to manually keep the server and clients up to date.