Duplicati - Lightweight Secure Backup Environment

4.14/5 (17 Reviews)

Duplicati is a free open source backup client for securely storing encrypted incremental compressed backups.

System Utilities File Management Open Source
FREE DOWNLOAD (v2.2.0.3)
File Size: 83.94MB | Safe & Verified

Key Features of Duplicati

  • Duplicati is a premier open source utility designed for high performance cloud backup and advanced data security management.
  • It provides users with a remarkably robust environment to store encrypted incremental and compressed backups on various cloud storage services like Google Drive OneDrive and Amazon S3 with absolute precision.
  • The software features strong AES 256 encryption and a zero trust architecture ensuring that your data is encrypted locally before being transferred to any remote server.
  • In 2026 it remains a vital tool for privacy conscious individuals and organizations needing a safe and verified environment to automate offsite backups and protect against data loss from hardware failure or ransomware attacks.
  • Its support for multiple destinations and a lightweight web based interface ensures that every backup job is handled with incredible speed and professional grade reliability.
  • Duplicati is the globally trusted choice for powerful and secure cloud backup across all modern desktop platforms.

How to set up secure cloud backups with Duplicati

Duplicati works through a web-based interface to back up your files securely to any cloud storage provider. Follow these steps to create your first encrypted backup plan:

  1. Install and Open the Web Interface
    Download the installer from the official site. Once installed, Duplicati runs in the background. Access the configuration dashboard by right-clicking the tray icon and selecting Open, or navigate to localhost:8200 in your browser.
  2. Configure Destination and Encryption
    Click Add backup and choose "Configure a new backup." Set a strong Passphrase; Duplicati uses AES-256 encryption by default. Then, select your storage type (e.g., Google Drive, Dropbox, or FTP) and click "Test Connection" to ensure Duplicati can reach your cloud.
  3. Select Source Data and Schedule
    Browse your local folders and check the boxes for the data you want to protect. On the next screen, set your Schedule (e.g., daily at 2:00 AM) to ensure your backups run automatically without manual intervention.
  4. Set Retention and Run
    Choose how many versions you want to keep (e.g., "Smart backup retention"). Click Save and then hit Run now to perform your initial upload. Future backups will be "incremental," meaning only changed data is uploaded.
Pro Tip: Always export your backup configuration to a file or write down your passphrase. Because Duplicati encrypts everything locally, if you lose your passphrase, your data cannot be recovered from the cloud!

Frequently Asked Questions

Yes. Duplicati is licensed under the LGPL, meaning it is free and open-source software. You can use it for personal, educational, or commercial purposes without paying any licensing fees.

It resumes automatically. Duplicati is designed to handle interruptions gracefully. It uses a local database to track "blocks" of data; when the system restarts, it will verify the state of the remote files and pick up exactly where it left off.

Yes. You can install Duplicati on a new machine and select the Restore from configuration option. As long as you have access to your cloud storage credentials and your encryption passphrase, you can rebuild the local database and download your files.

This usually happens if the application is closed unexpectedly during a database update. To fix this, go to your backup job, click Database under the advanced menu, and select Recreate. This will resync your local index with the files stored in the cloud.

Technical Specifications

Duplicati Screenshot

Screenshot of Duplicati | Free Backup Software Download