Syncthing (Pulse) 是一个使用 Go 语言编写的开源 P2P 文件同步软件。官方的介绍是：

Pulse (previously Syncthing) replaces proprietary sync and cloud services with something open, trustworthy and distributed. Your data is your data alone and you deserve to choose where it is stored, if it is shared with some third party, and how it’s transmitted over the Internet.