Duplicati

Free, open-source backup client that encrypts data before sending it to cloud, NAS or local storage.

Our verdict

Duplicati suits home users and small teams who want a free encrypted backup client with many storage options. Skip it if you want a managed service with support included at no cost.

What it does well

Core client is MIT-licensed, free and described as having no limitations
Encrypts with AES-256 or GPG before upload
Supports many destinations including S3, Backblaze B2, OneDrive, SFTP and NAS

Where it falls short

Paid console features (alerts, remote management) cost per machine
Some folders in the repo use a separate proprietary Duplicati Inc licence
Free console plan monitors only 2 machines and the last 200 backups

The Duplicati website — The official Duplicati website, 17 October 2026.

Duplicati is a free, open-source backup client that stores encrypted, incremental, compressed backups. Data is encrypted with AES-256 or GNU Privacy Guard before it leaves your machine. The README lists Windows, macOS and Linux, and destinations include Amazon S3, Backblaze B2, Dropbox, Google Drive, OneDrive, MEGA, FTP, SFTP and WebDAV.

The client itself is free. Duplicati Inc sells an optional hosted console: Free ($0, up to 2 machines, last 200 backups), Pro (listed at $2 and $2.50 per machine per month, up to 100 machines, adds missed-backup alerts, remote management and 100 GB storage per machine) and Enterprise (from $3 per machine per month, minimum 10 machines, yearly contract). Extra storage is $0.60 per 100 GB per month, and Microsoft 365 or Google Workspace backup is $0.50 per user per month, billed yearly.

Licensing: the repository's LICENSE is MIT, with content under proprietary/ covered by a separate Duplicati Inc licence.

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Last updated 17 October 2026. Facts checked against the official site on 16 October 2026. How we make money