Restic

Restic is a backup program that creates copies of files from Linux, BSD, Mac and Windows systems to various storage types, both self-hosted and online services. The tool works as a single executable without requiring a server or complex configuration. It transfers only the portions of files that have changed, reducing storage needs. The backup process uses cryptographic techniques throughout to secure data, and users can verify that backed-up files can be restored when needed. The program is developed by restic and released under the BSD 2-Clause license.

Restic is free and completely open source. It emphasizes backward compatibility so that users can reliably restore data from older backups. The project follows semantic versioning to clearly define which versions maintain compatibility with existing repositories and data structures. The tool is written in Go and provides installation through native binaries and a manual with detailed usage instructions.