"Syncthing is and open and decentralized sync and cloud service that lets you share and synchronize files with other computers and provides you with full control over how your data is shared and who can access it.

Unlike traditional cloud services, Syncthing does not store your data anywhere else, there are no third party servers involved. In addition, all communication is secured using TLS and every node is identified by a strong cryptographic certificate. Only computers that have been explicitly allowed can connect to your file sharing cloud.

Syncthing is portable and does not require installation. It uses a browser based GUI that allows you to configure the application and monitor file sharing activity.

You start by selecting one or more folders (on your computer) that you want to share with others. You can then select or invite other computers that are running Syncthing and choose to allow them access to your files.

Syncthing is easy to use and configure. It provides you with full control over the files you want to share and works over LAN or Internet without the need for any complicated IP configurations."

https://www.snapfiles.com/get/syncthing.html

Works on Mac OS X, Windows, Linux, FreeBSD, Solaris, OpenBSD, and many others

Home Page
https://syncthing.net/

Release Notes
https://github.com/syncthing/syncthing/releases/latest