# Syncthing

Open Source Continuous File Synchronization

Repository: https://github.com/syncthing/syncthing
Canonical: https://ross.abutalabs.com/products/syncthing
Homepage: https://syncthing.net/
Language: Go
License: MPL-2.0
License Family: copyleft
Topics: synchronization, go, peer-to-peer, p2p
Last push: 2026-08-25T01:28:51+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 96, longevity 100
- inputs: {"age_days": 4663, "days_push": 9, "days_rel": 28, "gap_med": 23, "n_releases_24m": 34}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 88023, forks 5434 (observed 2026-08-28T04:12:23.079081+00:00)

## What it is
Syncthing is an open-source continuous file synchronization program that syncs files between two or more computers over a peer-to-peer network. It is written in Go, encrypts data in transit, and runs on all common platforms with a web GUI and native wrappers.

## Use cases
- sync files between my laptop and desktop without a cloud provider
- replace Dropbox with a self-hosted sync tool
- keep a folder mirrored across multiple devices automatically
- sync photos from my Android phone to my home server
- continuously back up files between machines over my LAN
- share a folder with a friend without uploading to third-party servers

## When to choose
- you want private, encrypted, peer-to-peer sync without cloud storage
- you need cross-platform continuous synchronization including Android
- you prefer self-hosted software with no vendor lock-in

## When to avoid
- you need real-time collaborative editing or versioned cloud sharing links
- you want managed cloud backup with offsite retention
- you need a simple one-way backup tool rather than two-way sync

## Facets
- artifact type: application
- maturity: stable
- function: file-system, networking, cryptography, gui, self-hosted
- domain: files, privacy, cross-platform, self-hosted, developer-tools
- platform: windows, cross-platform, go
- tags: file-synchronization, peer-to-peer, continuous-sync, dropbox-alternative, backup, linux, macos, android, docker

## Member repositories
- syncthing/syncthing (main) score 98
- syncthing/syncthing-android (plugin) score 10
- syncthing/syncthing-macos (plugin) score 89

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:12:23.079081+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 2026-08-29T16:13:53.129929+00:00, confidence not recorded.
  - readme: https://github.com/syncthing/syncthing (fetched 2026-08-28T04:12:23.079081+00:00, sha a2fdc779ad29)
- Data as of 2026-08-30T08:39:29.467469+00:00.