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Backup & disaster recovery

Duplicati

Free encrypted incremental backup to just about any cloud storage.

open sourcedesktop

Reviewed by Giuseppe Tommaso Curella, Infrastructure & network engineer Updated 2026-11-05

Official site www.duplicati.com

Independent reference — this page is a review. Duplicati is downloaded from the vendor’s official site, not from here.

PlatformsWindows/macOS/Linux, web UI
LicenceOpen source — MIT
PriceFree
SectionBackup & disaster recovery
Updated2026-11-05

What it is

Free and open source, it writes encrypted, compressed, incremental backups to cloud storage — S3, B2, Google Drive, FTP, WebDAV. It’s a cheap route to offsite backup, with AES-256 and a web interface.

Problems it closes

  • You want encrypted offsite backups to the cheap cloud storage you already pay for.
  • Backups need to stay incremental to keep bandwidth and storage costs down.
  • One machine, or a small handful, needs simple scheduled backup.

How administrators run it

  • Point it at S3, Backblaze B2, Google Drive, FTP or WebDAV and set a schedule.
  • Let it churn out AES-256 encrypted, compressed, deduplicated incrementals.
  • Restore files from the web UI, and rehearse those restores regularly.
Duplicati backup interface
Screenshot: Wikimedia Commons, CC BY-SA 3.0 (classic GUI v1.3.4).

Strengths & trade-offs

Strengths

  • Free and open source.
  • Strong client-side encryption and plenty of cloud backends.
  • Deduplicated incrementals keep storage and bandwidth low.

Trade-offs

  • Built for files, not full disk images.
  • Version 2 has worn a beta label for years, so test your restores.

Common questions

Does it make image backups?

No — it does file and folder backup. For full disk images, reach for Macrium or Veeam.

Is data encrypted before it leaves the machine?

Yes — encrypted client-side with AES-256 before upload.

Bareos Open-source client-server backup at enterprise scale — disk, tape or cloud. open sourcedesktop Linux server; clients for Linux/Windows/macOS/BSD/Solaris/AIX; web UI Macrium Reflect Disk imaging and partition backup on Windows, bare-metal recovery included. paiddesktop Windows only (desktop + Server) Veeam Backup & Replication Enterprise backup and replication across virtual, physical and cloud workloads. freemiumdesktop Windows console; protects VMware/Hyper-V/Nutanix/Proxmox, physical servers, cloud, M365