Obsidian Sync alternatives: 8 open-source picks
Obsidian Sync costs $5/mo — $60 a year. These 8 alternatives replace it for $0, led by Syncthing, SiYuan and Nextcloud. All 8 are open source. License, stars and last commit checked by hand on 2026-08-29. No trials, no crippled tiers.
Syncs the vault directly between computers; iPhones remain the awkward relative.
licenseMPL-2.0
runson your machine
installInstall a native package or binary on every device, exchange device IDs, and share the vault folder
dataThe original Markdown files and attachments remain as normal files in selected folders on each peer; Syncthing keeps its configuration and index database locally
the catch vs Obsidian SyncIt has no central always-available history or recovery service, devices need overlapping availability to propagate changes, and iPhone/iPad support depends on third-party clients.
setupEvery device needs a client and pairing, at least one peer must be online to receive changes, and there is no official iOS client
facts verified 2026-08-11
Privacy-first block-based personal knowledge management with bidirectional links
licenseAGPL-3.0
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Your own cloud, complete with the privilege of maintaining your own cloud.
licenseAGPL-3.0+
runsyour server
installNextcloud All-in-One Docker stack or a supported web-server/PHP/database installation, plus sync clients
dataUser files in a server data directory or object store; accounts, shares, file cache, versions, and other metadata in the database, with optional local synced copies
the catch vs Obsidian SyncIt can sync the folder, but it is not Obsidian-aware, does not provide the same conflict handling and version recovery by default, and makes you operate the cloud service.
setupA practical deployment needs an always-on host, Docker or a full PHP/database stack, domain and TLS, storage planning, backups, and upgrades
facts verified 2026-08-11
AI-powered workspace with docs, wikis, and kanban boards built in Rust/Flutter
licenseAGPL-3.0
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Docs, whiteboards, and databases fused into one local-first workspace
licenseMIT (open core)
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Markdown note-taking app with E2E-encrypted sync across all platforms
licenseAGPL-3.0
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Local-first outliner for networked thought with backlinks and daily journals
licenseAGPL-3.0
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
Fast, collaborative team wiki and knowledge base with slick editor
licenseBSL-1.1
runsyour server
setupnot verified by us yet — check the repo README
facts verified 2026-08-29
What each one is, in full: Syncthing · SiYuan · Nextcloud · AppFlowy · AFFiNE · Joplin
last updated 2026-08-29 · no votes, no pay-to-list · just what's real
how to choose a Obsidian Sync alternative
Easiest to get running
Syncthing — a one-click install, no server to maintain.
Most proven
Syncthing, with 87,300 GitHub stars — the largest community of the 8, which usually means more answers when something breaks.
Runs on your own machine, no server
Syncthing — nothing to host, your data stays on your disk.
Works on your phone
Nextcloud has a mobile app on iOS and Android.
Needs real ops to self-host
Nextcloud is capable but expects someone to run a server, updates and backups. Budget for that before choosing it.
what you give up by leaving Obsidian Sync
- official mobile sync polish
- conflict handling
- version history UI
- encrypted vault workflow
- Obsidian support
None of the picks above covers all of it. The full verdict says which gaps matter.
Obsidian Sync alternatives at a glance
| tool | license | running it | platforms | stars | active |
|---|---|---|---|---|---|
| Syncthing | MPL-2.0 | one-click install | macos, windows, linux, cli | 87,300 | 2026-08 |
| SiYuan | AGPL-3.0 | one-click install | self-hosted, web | 46,000 | 2026-08 |
| Nextcloud | AGPL-3.0+ | self-host, real ops | web, macos, windows, linux, ios, android, self-hosted | 36,300 | 2026-08 |
| AppFlowy | AGPL-3.0 | docker to self-host | self-hosted, web | 75,000 | 2026-08 |
| AFFiNE | MIT (open core) | docker to self-host | self-hosted, web | 71,000 | 2026-08 |
| Joplin | AGPL-3.0 | one-click install | self-hosted, web | 56,000 | 2026-08 |
| Logseq | AGPL-3.0 | one-click install | self-hosted, web | 44,000 | 2026-08 |
| Outline | BSL-1.1 | docker to self-host | self-hosted, web | 40,000 | 2026-08 |
why people still pay for Obsidian Sync
They pay for no-drama sync across devices while keeping Obsidian's local-first model. If none of that applies to you, any pick above saves $60 a year.
questions about switching from Obsidian Sync
Is there an open-source alternative to Obsidian Sync?
Yes: Syncthing, SiYuan, Nextcloud and 5 more. Every tool on this page is open source: no trials, no crippled tiers.
Can open source really replace Obsidian Sync?
Our verdict is YES. Syncthing (87k stars), AppFlowy (75k stars), AFFiNE (71k stars) are mature open-source replacements for Obsidian Sync — self-host in one command and stop paying $5/mo. The full verdict, and what you give up by switching, is at caniopensourceit.online/obsidian-sync.
What is the easiest open-source Obsidian Sync alternative to set up?
Syncthing — a one-click install, no server to maintain.
What is the most popular open-source Obsidian Sync alternative?
By GitHub stars, Syncthing (87,300). AppFlowy is next with 75,000.
