Duplicacy

Enables multiple machines to back up to the same storage simultaneously without locks, facilitating cross-computer deduplication as described in the Lock-Free Deduplication wiki.

Stores each chunk independently using its hash as the filename, eliminating centralized databases for simpler implementation and enabling features like asymmetric encryption.

Shown to outperform other backup tools like restic and duplicity in speed tests, as evidenced by the benchmarking results backing up the Linux code base.

Supports a wide range of backends including S3, B2, Google Drive, and OneDrive, making it versatile for various cloud and local storage options.

Offers erasure coding for resilience and RSA encryption for enhanced security, going beyond basic backup tools.