Duplicati

Duplicati is a powerful, open-source backup client that provides strongly encrypted, incremental backups to a wide variety of cloud storage services and local file servers. It stands out for its flexibility and cost-effectiveness, as it uses your existing cloud storage (like Backblaze B2, Wasabi, Google Drive, OneDrive, S3-compatible) rather than proprietary locked-in cloud. All data is encrypted with AES-256 before leaving your computer. It offers features typical of commercial software: scheduling, retention policies, file versioning, and backup verification.

Ideal for tech-savvy individuals, homelab enthusiasts, and small businesses on a budget, Duplicati provides enterprise-grade backup concepts without licensing fees. The main trade-off is the lack of official support and a steeper setup curve compared to commercial all-in-one solutions. It compares to other open-source tools like Restic by offering a more user-friendly GUI and built-in scheduling.