What it is
Duplicati and Restic are incremental backup tools featuring deduplication and encryption. Duplicati targets home users and small businesses with its graphical interface. Restic is a modern CLI tool written in Go, optimized for speed and reliability in server environments.
| Parameter | Duplicati | Restic |
|---|---|---|
| Language | C# (.NET) | Go |
| Interface | Web UI / CLI | CLI |
| Deduplication | Block-based (fixed) | CDC (variable) |
| Compression | Zip, 7z | Zstd (since v0.14.0) |
| Database | SQLite (local) | None required |
| Target Environment | Desktop / NAS | Server / DevOps |
Performance
Restic significantly outperforms Duplicati in scanning and indexing operations. Due to its Go-based architecture and lack of reliance on a heavy local database, Restic processes millions of files at disk subsystem speeds. Duplicati uses SQLite for index storage; when backup volume exceeds 1 TB, the database often becomes a bottleneck, slowing down restore and verification operations. In tests on 500 GB datasets, Restic completes an incremental backup in 2-3 minutes, while Duplicati may take 15-20 minutes to recalculate hashes in the DB.
Configuration & complexity
Duplicati is configured via a browser (port 8200). A setup wizard allows connecting S3, Backblaze, or SFTP without command-line knowledge. Restic is managed via the terminal. Simple commands are used to initialize a repository and create a backup: restic init --repo /backup and restic -r /backup backup /data. For automation, Restic requires shell scripts or wrappers like Autorestic.
When to choose what
- Duplicati: Backing up personal documents and photos from a home PC or laptop to cloud storage. Best when process visualization and easy file restoration via browser are important.
- Restic: Backing up server configurations, databases, and Docker containers. Ideal for CI/CD pipelines and systems where background task speed is critical.
Cost / licensing
Both projects are free. Duplicati is distributed under the LGPL license, Restic under the BSD 2-Clause license. Both tools allow using any S3-compatible storage, minimizing infrastructure costs.
Ecosystem & integrations
Duplicati has a built-in task scheduler. Restic relies on system tools (systemd timers, cron). A mature ecosystem of third-party utilities exists for Restic: restic-browser for GUI restoration and prometheus-exporter for monitoring backup status. Duplicati is harder to integrate into monitoring systems due to its monolithic architecture.
Verdict
Duplicati is suitable for Windows/macOS users who need a clear interface and are not concerned with performance on massive datasets. Restic is the choice for professionals in server infrastructure, where data format reliability and performance outweigh the need for a GUI.