Alternatives to Duplicacy
Lock-free deduplication backup
Duplicacy ranks #3 of 12 in Backup software, with an Alt Score of 96. It is proprietary, sold by subscription from $20/year and available on Windows, macOS and Linux. 10 of 10 checklist rows are verified against a public source.
Duplicacy is for individuals, businesses, and IT service providers who need reliable, encrypted backups of computers or servers to cloud or network storage, including users who want a scriptable CLI or a managed GUI for handling multiple machines.
A backup tool with lock-free deduplication, so multiple computers can back up to the same cloud storage and share duplicate chunks without a central lock or database, while still allowing old backups to be pruned safely. It supports over 20 storage backends, including S3, Backblaze B2, Google Cloud, Azure, Dropbox, OneDrive, SFTP, WebDAV, and local disks. All data is encrypted client-side before upload, and the CLI's source is open on GitHub for inspection. A web-based GUI adds scheduling, dashboards, and job management (backup, copy, check, prune) on top of the same CLI engine.
You initialize a repository pointing at a storage destination, then run backup to split files into variable-size chunks, encrypt them, and upload only chunks not already present in storage. Restore reconstructs files from those chunks by revision, and prune removes chunks no longer referenced by any kept revision, all without needing a centralized index.
Why people leave Duplicacy
Dashed reasons are sourced facts; the rest are opinions. Vendors can dispute.
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Ranked alternatives
Ordered by Alt Score. Click any score to see the breakdown.
Feature comparison
Rows come from the Backup software checklist (14 rows). Human-verified cells only. ? means the value has not been verified.
| Backup software checklist | Duplicacy | Duplicati | Kopia | Restic | Arq | Vorta |
|---|---|---|---|---|---|---|
| Pricing model | ||||||
| Starts at | ||||||
| License | ||||||
| Platforms | ||||||
| Incremental backups | ||||||
| E2E encryption | ||||||
| Deduplication | ||||||
| Cloud targets supported | ||||||
| Local / NAS targets | ||||||
| Scheduling | ||||||
| Versioning & retention policies | ||||||
| Restore granularity | ||||||
| Open source | ||||||
| Compression |
Every fact and feature listed for Duplicacy is verified against its own pages. Each alternative is sourced on its own page.
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License Proprietary verified 2026-07-11
Free for personal use or commercial trial
https://github.com/gilbertchen/duplicacy/blob/master/LICENSE.md -
Starts at $20/year verified 2026-07-11
$20 first computer
https://duplicacy.com/buy.html -
Pricing model Subscription verified 2026-07-11
All licenses are subscription-based.
https://duplicacy.com/buy.html -
Platforms Windows, macOS, Linux verified 2026-07-11
There is also a Web GUI frontend built for Windows, macOS, and Linux, available from https://duplicacy.com.
https://github.com/gilbertchen/duplicacy#readme -
Status active verified 2026-07-11
v3.2.5
https://github.com/gilbertchen/duplicacy/releases -
Incremental backups Yes verified 2026-07-11
Incremental Backup
https://github.com/gilbertchen/duplicacy#comparison-with-other-backup-tools -
E2E encryption Yes verified 2026-07-11
master key derived from the PBKDF2 function on the storage password chosen by the user.
https://github.com/gilbertchen/duplicacy/wiki/Encryption -
Deduplication Yes verified 2026-07-11
Duplicacy: A lock-free deduplication cloud backup tool
https://github.com/gilbertchen/duplicacy#readme -
Cloud targets supported Yes verified 2026-07-11
Amazon S3
https://github.com/gilbertchen/duplicacy#storages -
Local / NAS targets Yes verified 2026-07-11
Local disk
https://github.com/gilbertchen/duplicacy#storages -
Scheduling Yes verified 2026-07-11
scheduling and email notifications
https://duplicacy.com/download.html -
Versioning & retention policies Yes verified 2026-07-11
Keep 1 revision every n days for revisions older than m days.
https://github.com/gilbertchen/duplicacy/wiki/Prune -
Restore granularity Yes verified 2026-07-11
the restore procedure reads them from the command line
https://github.com/gilbertchen/duplicacy/wiki/Restore -
Open source Partial verified 2026-07-11
Free for personal use or commercial trial
https://github.com/gilbertchen/duplicacy/blob/master/LICENSE.md -
Compression Yes verified 2026-07-11
Compression
https://github.com/gilbertchen/duplicacy#comparison-with-other-backup-tools
FAQ
Yes. Kopia, Restic and Vorta have a free tier or are fully free. Free-tier limits in the comparison table are verified and dated.
Duplicati, Kopia and Restic — every license claim links its source.