# 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. Source: https://altcatalog.com/alternatives/duplicacy/ Category: Backup software ## Overview - **Who it's for**: 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. - **What you get**: 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. - **How it works**: 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. ## Profile - **License**: Proprietary (verified 2026-07-11) - **Pricing model**: Subscription (verified 2026-07-11) - **Starts at**: $20/year (verified 2026-07-11) - **Platforms**: Windows, macOS, Linux - **Status**: active (verified 2026-07-11) ## Ranked alternatives | # | App | Alt Score | Licence | Platforms | |---|-----|-----------|---------|-----------| | 1 | [Duplicati](https://altcatalog.com/alternatives/duplicati.md) | 100 | MIT | Windows, macOS, Linux | | 2 | [Kopia](https://altcatalog.com/alternatives/kopia.md) | 100 | Apache-2.0 | Windows, macOS, Linux | | 3 | [Restic](https://altcatalog.com/alternatives/restic.md) | 96 | BSD-2-Clause | Windows, macOS, Linux | | 4 | [Arq](https://altcatalog.com/alternatives/arq.md) | 91 | Proprietary | Windows, macOS | | 5 | [Vorta](https://altcatalog.com/alternatives/vorta.md) | 86 | GPL-3.0 | macOS, Linux | | 6 | [IDrive](https://altcatalog.com/alternatives/idrive.md) | 82 | Proprietary | Windows, macOS, Linux, iOS | | 7 | [SpiderOak](https://altcatalog.com/alternatives/spideroak.md) | 82 | Proprietary | Windows, macOS, Linux | | 8 | [UrBackup](https://altcatalog.com/alternatives/urbackup.md) | 82 | AGPL-3.0 | Windows, macOS, Linux | | 9 | [Backblaze](https://altcatalog.com/alternatives/backblaze.md) | 64 | Proprietary | Windows, macOS | | 10 | [Carbonite](https://altcatalog.com/alternatives/carbonite.md) | 42 | Proprietary | Windows, macOS | | 11 | [Acronis](https://altcatalog.com/alternatives/acronis.md) | 37 | Proprietary | Windows, macOS, iOS, Android | Alt Score = Verified coverage (90%) + Visibility (10%). See https://altcatalog.com/how-alt-score-works/ ## Feature comparison Legend: Yes / No / Partial / ? (not verified). | Backup software checklist | Duplicacy | Duplicati | Kopia | Restic | Arq | Vorta | |---|---|---|---|---|---|---| | Pricing model | Subscription | OSS + paid hosting | Free | Free | One-time | Free | | Starts at | $20/year | $2/machine/month | ? | ? | $49.99 one-time (per computer) | ? | | License | Proprietary | MIT | Apache-2.0 | BSD-2-Clause | Proprietary | GPL-3.0 | | Platforms | Windows, macOS, Linux | Windows, macOS, Linux | Windows, macOS, Linux | Windows, macOS, Linux | Windows, macOS | macOS, Linux | | Incremental backups | Yes | Yes | Yes | Yes | Yes | ? | | E2E encryption | Yes | Yes | Yes | Yes | Yes | Yes | | Deduplication | Yes | Yes | Yes | Yes | Yes | Yes | | Cloud targets supported | Yes | Yes | Yes | Yes | Yes | Partial | | Local / NAS targets | Yes | Yes | Yes | Yes | Yes | Yes | | Scheduling | Yes | Yes | Yes | Partial | Yes | Yes | | Versioning & retention policies | Yes | Yes | Yes | Yes | Yes | Yes | | Restore granularity | Yes | Yes | Yes | Yes | Yes | Yes | | Open source | Partial | Yes | Yes | Yes | No | Yes | | Compression | Yes | Yes | Yes | Yes | Yes | Yes | ## Sources Sources for Duplicacy. Each alternative is sourced on its own page. - **License**: Proprietary — (verified 2026-07-11) - Quote: “Free for personal use or commercial trial” - **Starts at**: $20/year — (verified 2026-07-11) - Quote: “$20 first computer” - **Pricing model**: Subscription — (verified 2026-07-11) - Quote: “All licenses are subscription-based.” - **Platforms**: Windows, macOS, Linux — (verified 2026-07-11) - Quote: “There is also a Web GUI frontend built for Windows, macOS, and Linux, available from https://duplicacy.com.” - **Status**: active — (verified 2026-07-11) - Quote: “v3.2.5” - **Incremental backups**: Yes — (verified 2026-07-11) - Quote: “Incremental Backup” - **E2E encryption**: Yes — (verified 2026-07-11) - Quote: “master key derived from the PBKDF2 function on the storage password chosen by the user.” - **Deduplication**: Yes — (verified 2026-07-11) - Quote: “Duplicacy: A lock-free deduplication cloud backup tool” - **Cloud targets supported**: Yes — (verified 2026-07-11) - Quote: “Amazon S3” - **Local / NAS targets**: Yes — (verified 2026-07-11) - Quote: “Local disk” - **Scheduling**: Yes — (verified 2026-07-11) - Quote: “scheduling and email notifications” - **Versioning & retention policies**: Yes — (verified 2026-07-11) - Quote: “Keep 1 revision every n days for revisions older than m days.” - **Restore granularity**: Yes — (verified 2026-07-11) - Quote: “the restore procedure reads them from the command line” - **Open source**: Partial — (verified 2026-07-11) - Quote: “Free for personal use or commercial trial” - **Compression**: Yes — (verified 2026-07-11) - Quote: “Compression” --- Ranked by verified data, never by who paid. https://altcatalog.com/trust/