syncspirit is a continuous file synchronization program, which synchronizes files between devices. It is built using the C++ rotor actor framework. It implements the BEP-protocol for files synchronization, or, simplistically speaking, it is a syncthing-compatible synchronization program at protocol level, which uses the syncthing infrastructure (for global discovery and relaying).

Despite being functional, syncspirit is less feature-rich than syncthing and is still in heavy development