# acheong08/obi-sync

Reverse engineering of the native Obsidian sync and publish server

Repository: https://github.com/acheong08/obi-sync
Canonical: https://ross.abutalabs.com/products/obi-sync
Homepage: https://obsidian.md/sync
Language: Go
License: GPL-2.0
License Family: copyleft
Topics: obsidian-md, obsidian-vault, sync, obsidian-sync, obsidian-publish
Archived: true
Last push: 2023-12-28T13:14:27+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 79
- inputs: {"age_days": 1112, "days_push": 979, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1041, forks 55 (observed 2026-08-28T04:03:20.575064+00:00)

## What it is
A reverse-engineered, self-hosted replacement for the official Obsidian Sync and Publish servers, written in Go. It provides end-to-end encrypted note synchronization, file history, vault sharing, and basic markdown publishing via a companion Obsidian plugin.

## Use cases
- self-host obsidian sync server
- sync obsidian notes across devices without subscription
- host my own obsidian vault sync with encryption
- share an obsidian vault between users
- publish obsidian markdown notes on my own server
- replace obsidian sync paid plan with self-hosted alternative

## When to choose
- you want to avoid Obsidian Sync subscription fees and self-host your notes
- you need end-to-end encrypted sync across iOS, Android, Linux, macOS, and Windows
- you want control over storage limits, user accounts, and server location
- you need vault sharing or basic markdown publishing on your own infrastructure

## When to avoid
- you use Obsidian 1.4.11 or newer, where the companion plugin is intentionally broken
- you want a zero-maintenance, officially supported sync solution
- you need full-featured publishing with rendering, themes, and graph search
- you are uncomfortable with a reverse-engineered protocol that the vendor actively opposes

## Facets
- artifact type: service
- maturity: maintenance
- function: self-hosted, backup, http-server, security
- domain: self-hosted, developer-tools, files, privacy
- platform: self-hosted, cross-platform
- tags: obsidian, note-sync, reverse-engineering, vault-sharing, publishing, e2e-encryption, linux, docker

## Member repositories
- acheong08/obi-sync (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:20.575064+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 2026-08-30T07:02:52.810155+00:00, confidence not recorded.
  - readme: https://github.com/acheong08/obi-sync (fetched 2026-08-28T04:03:20.575064+00:00, sha 7c4c3897131b)
  - homepage: https://obsidian.md/sync (fetched 2026-08-29T13:03:50.312498+00:00, sha 9e0926e46ec4)
  - site_page: https://obsidian.md/about (fetched 2026-08-29T13:03:50.324020+00:00, sha 0750e83b1301)
  - site_page: https://obsidian.md/pricing (fetched 2026-08-29T13:03:50.322182+00:00, sha cc5bf181c4bf)
  - site_page: https://obsidian.md/changelog (fetched 2026-08-29T13:03:50.325839+00:00, sha a0c6d9bbac25)
- Data as of 2026-08-30T08:39:29.467469+00:00.