Open-source outliner knowledge base built by Logseq Inc. In the classic graph, notes are Markdown or Org-mode files on disk; every bullet within a note is a first-class block with its own identifier, reference, and query surface.
Core app free under AGPL-3.0. The public site still describes Logseq as open source, privacy-first, and locally owned, with Sync beta for encrypted cross-device sync. Historical official Sync setup tied beta access to $5 or $15 monthly Open Collective donor tiers; confirm the current checkout path before presenting Sync as a normal SaaS add-on. Local-first by default: files live in a folder you control, and you can back up with any filesystem tool.
Recent developments
- May 16, 2026: Logseq DB updates shipped markdown mirror for DB graphs, CLI query support, graph-view rebuild work, and sync hardening. That makes the DB version more interesting for agent/CLI workflows, but it also means buyers should separate stable classic Markdown graphs from DB-version migration risk.
- June 8, 2026: AiPedia rechecked the official docs, site, forum changelog, and GitHub posture. Logseq remains a good personal/local-first outliner, but teams should watch DB-version mobile parity, markdown round-trip maturity, and collaboration limits before standardizing.
System Verdict
Pick Logseq if you think in bullets and want Roam-style block references without the subscription. Block-level transclusion, daily journal as the primary entry point, and query language are all first-class. Files stay plain-text markdown, so the vault survives the vendor.
Skip it if you want page-style document editing or real-time collaboration. Obsidian is the better pick for mixed page + note workflows; Notion AI handles teams. Logseq’s mobile apps are functional but trail Obsidian’s polish.
Who pays which tier: Core app free under AGPL-3.0. Treat Sync as a beta/paid-support decision unless the current checkout confirms otherwise; historical official docs tied Sync access to $5/$15 monthly donor tiers. Power users can instead sync classic Markdown graphs via iCloud, Syncthing, or git, but DB graphs need more careful review.
Key Facts
| License | AGPL-3.0 (fully open-source) |
| Storage model | Classic graph: plain-text Markdown or Org-mode on disk; DB version: active SQLite/markdown mirror work |
| Core paradigm | Outliner; every bullet is a block with block references |
| Graph view | Native, page-level and block-level |
| PDF annotation | Built-in, highlights become blocks |
| Query language | Datalog-style queries and simple tag filters |
| Whiteboards | Native canvas feature since 2023 |
| Mobile apps | iOS and Android |
| Desktop | Windows, macOS, Linux |
| Sync | Sync beta; historical official access tied to $5/$15 monthly donor tiers; roll-your-own works best for classic Markdown graphs |
| AI | Plugin ecosystem and emerging DB/CLI/MCP discussion; bring your own LLM API keys |
Every data point verified 2026-06-12 against logseq.com, the Logseq docs, the GitHub repo, and the May 2026 DB changelog thread.
What it actually is
A Roam-Research-style outliner that stores everything as plain files. The daily journal is the default entry point; you write bullets that become blocks; blocks get referenced across pages via ((block-id)) transclusion or [[Page Name]] wiki links.
The moat is the outliner plus block references. Obsidian’s strength is page-level notes with wiki links between them; Logseq’s strength is block-level granularity, so a single bullet written once can appear referenced on many pages without copy-paste.
Files stay Markdown (.md) or Org-mode (.org) on disk, your choice. The vault is a folder. You back it up with whatever filesystem or git tool you already use.
When to pick Logseq
- You think in outlines, not documents. If your brain produces bullets before paragraphs, Logseq fits the shape.
- You want Roam’s model without the $165/year. Logseq ships the same block-reference mechanics under AGPL-3.0.
- Daily journaling drives your system. The journal page is the default; every day gets its own file automatically.
- You annotate PDFs for research or study. Native PDF annotation with highlight-as-block is built in.
- Open-source licensing is a hard requirement. AGPL-3.0 is the strongest copyleft among mainstream note tools.
When to pick something else
- Page-style documents and mixed workflows: Obsidian. Page-centric model with optional outliner plugins.
- Team collaboration, shared databases, real-time: Notion AI. Logseq is single-user.
- Free single-source research Q&A: NotebookLM.
- Polished mobile-first note-taking: Apple Notes or Bear. Logseq mobile is usable but basic.
- AI-native notes out of the box: Notion AI or Obsidian with Copilot plugin + Claude key.
Pricing
| Plan | Price | Who’s it for |
|---|---|---|
| Logseq (core) | $0 | All users; full features, no caps |
| Logseq Sync beta | Confirm live; historical beta access via $5/$15 monthly donor tiers | Anyone syncing across devices; E2E encrypted |
Prices verified 2026-06-12 against logseq.com and the official Sync setup blog. Sync is optional; iCloud Drive, Syncthing, or git can work for classic Markdown graphs, but DB graphs and mobile parity need a separate test before standardizing.
Against the alternatives
| Logseq | Obsidian | Notion | Roam Research | |
|---|---|---|---|---|
| Price | Free core + beta sync to verify | Free + $4/mo sync | Free tier + $10/user/mo | $15/mo |
| License | AGPL-3.0 | Proprietary (free app) | Proprietary | Proprietary |
| Paradigm | Outliner (blocks) | Page-based + optional outliner | Page + database | Outliner (blocks) |
| Local-first files | Yes (MD/Org) | Yes (MD) | No (cloud) | No (cloud) |
| Block references | Native, first-class | Plugin-assisted | Limited | Native |
| Real-time collab | No | No | Yes | Yes |
| Graph view | Yes | Yes | No | Yes |
| Best viewed as | Roam-without-subscription | PKM power tool | Team workspace | Outliner reference |
Failure modes
- Mobile trails desktop. Syncing is reliable but the mobile UI is a stripped-down view. Heavy capture on phone is clunkier than Apple Notes or Bear.
- No real-time collaboration. Multi-device sync is not a substitute for Notion-style collaborative editing. Confirm conflict behavior before sharing graphs across a team.
- Smaller plugin ecosystem than Obsidian. Several hundred plugins vs Obsidian’s 2,690+. Functional gaps exist.
- Config-heavy for polish. Default theme and keybindings are functional; most users tune extensively.
- AGPL-3.0 can complicate embedding. Enterprises building products on top must ship source of derivative works.
- DB version is still a migration question. Markdown mirror, CLI query support, graph-view rebuilds, and sync hardening are encouraging, but teams should not assume the DB version has the same maturity, mobile parity, or round-trip file behavior as the classic Markdown graph.
Methodology
This page was produced by the aipedia.wiki editorial pipeline. Last verified 2026-06-12 against logseq.com, the Logseq docs, the GitHub repo, the official Sync setup blog, and the Logseq DB May 2026 changelog.
FAQ
Is Logseq really free?
Yes. Core app is AGPL-3.0 with no feature caps. Sync is the paid/beta piece to check live; historical official docs tied beta access to $5/$15 monthly donor tiers. You can also sync classic Markdown graphs via iCloud Drive, Syncthing, or git.
How is Logseq different from Obsidian?
Both store local knowledge, but the current comparison needs nuance. Classic Logseq graphs use plain-text Markdown/Org files locally; the newer DB version adds SQLite plus markdown mirror work. Logseq is outliner-first (every bullet is a block with references); Obsidian is page-first (every file is a note). Obsidian has a larger plugin ecosystem and more polished mobile; Logseq has daily journal and block references built in.
Does Logseq have AI features?
Not in the core app. The plugin ecosystem ships AI integrations that use your own LLM API keys (Claude, OpenAI frontier models, Gemini). The community plugin logseq-ai-assistant is the common entry point.
What about Roam Research?
Logseq is effectively the open-source Roam clone. Block references, bi-directional links, daily journal, and queries all match the Roam model. Roam is $15/month; Logseq is free. Most Roam users who left over price or data ownership ended up on Logseq.
Can I import my Obsidian vault?
Yes. Logseq reads Markdown files from any folder. Obsidian’s wiki links work. Obsidian’s plugin-dependent syntax (Dataview, Templater) does not port; you rebuild queries in Logseq’s Datalog-style syntax.
Sources
- Logseq official site: open-source, privacy-first, local-data positioning and Sync beta language
- Logseq docs: graph setup, Markdown import, block references, queries, plugins, and publishing docs
- Logseq GitHub repository: license, release activity, and DB/mobile development posture
- Logseq Sync setup blog: historical Sync beta access and donor-tier language
- Logseq DB May 2026 changelog: markdown mirror, CLI query, graph-view, and sync-hardening updates
Related
- Category: AI Notes
- Also see: Obsidian (page-based local-first alternative) · Notion AI (team workspace) · NotebookLM (research Q&A)
