# gilbertchen/duplicacy

A new generation cloud backup tool

Repository: https://github.com/gilbertchen/duplicacy
Canonical: https://ross.abutalabs.com/products/duplicacy
Homepage: https://duplicacy.com
Language: Go
License: NOASSERTION
License Family: other
Last push: 2026-08-06T03:41:54+00:00

## Health v2 (maintenance only)
Score: 69/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 96, release rhythm 16, longevity 100
- inputs: {"age_days": 3845, "days_push": 27, "days_rel": 488, "gap_med": 178, "n_releases_24m": 2}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5670, forks 352 (observed 2026-08-28T04:09:27.668650+00:00)

## What it is
Duplicacy is a cross-platform cloud backup tool built around lock-free deduplication, allowing multiple computers to back up to the same storage without coordination. It stores each chunk independently by hash, supports many cloud storage backends, and offers encryption and erasure coding.

## Use cases
- back up my files to cloud storage with deduplication
- back up multiple machines to the same storage without conflicts
- encrypted incremental backups to S3 or other cloud providers
- fast deduplicating backup of a large codebase
- restore previous versions of files from backups
- back up VMware ESXi virtual machines

## When to choose
- you need cross-machine deduplication to a shared cloud storage
- you want a fast, scriptable CLI backup tool with strong encryption
- you back up to many different cloud storage providers
- you need erasure coding or asymmetric encryption for backups

## When to avoid
- you want a simple GUI-only backup solution (the GUI is a paid product)
- you need block-level or full-disk imaging backups
- you prefer fully open-source tooling with a permissive license
- you need continuous real-time file syncing rather than scheduled backups

## Facets
- artifact type: cli-tool
- maturity: stable
- function: backup, cryptography, compression, file-system, cli
- domain: files, cloud-computing, security, developer-tools, cross-platform
- platform: windows, cross-platform, cli
- tags: cloud-backup, deduplication, lock-free-deduplication, restoration, erasure-coding, asymmetric-encryption, linux, macos

## Member repositories
- gilbertchen/duplicacy (main) score 69

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:27.668650+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:54:17.757581+00:00, confidence not recorded.
  - readme: https://github.com/gilbertchen/duplicacy (fetched 2026-08-28T04:09:27.668650+00:00, sha a557dfd2d173)
  - homepage: https://duplicacy.com (fetched 2026-08-29T08:49:25.052741+00:00, sha 0181a4b3178f)
- Data as of 2026-08-30T08:39:29.467469+00:00.