SyncThing

SyncThing is an open-source, peer-to-peer file synchronization tool that securely shares and keeps files consistent across multiple devices without relying on cloud storage. It works by directly connecting your devices over the internet or local network, encrypting data for privacy. When you add or modify a file on one device, SyncThing automatically updates it on all connected devices, ensuring everyone has the latest version. It’s useful for backing up files, collaborating, or keeping personal data synchronized across computers, phones, or servers, all while maintaining control over your data and privacy.