• Private. None of your data is ever stored anywhere else other than on your computers. There is no central server that might be compromised, legally or illegally.
• Encrypted. All communication is secured using TLS. The encryption used includes perfect forward secrecy to prevent any eavesdropper from ever gaining access to your data.
• Authenticated. Every node is identified by a strong cryptographic certificate. Only nodes you have explicitly allowed can connect to your cluster.

• Open Discourse. Development and usage is always open for discussion.
  Syncthing Discussion Forum
• Open Source. All source code is available on GitHub — what you see is what you get, there is no hidden funny business.
  Syncthing Source Code
• Open Protocol. The protocol is a documented standard — no hidden magic.
  Syncthing Protocol Definition
• Open Development. Any bugs found are immediately visible for anyone to browse — no hidden flaws.
  Syncthing Issue Tracker

Syncthing is still in development, although a large number of features have already been implemented:

• Web GUI. Configure and monitor Syncthing via a responsive and powerful interface accessible via your browser.
• Portable. Works on Mac OS X, Windows, Linux, FreeBSD, Solaris and OpenBSD. Run it on your desktop computers and synchronize them with your server for backup.
• Simple. Syncthing doesn't need IP addresses or advanced configuration: it just works, over LAN and over the Internet. Every machine is identified by an ID. Just give your ID to your friends, share a folder and watch: UPnP will do if you don't want to port forward or you don't know how.
• Powerful. Synchronize as many folders as you need with different people.