Logseq

Decentralized Application

Open-source, local-first knowledge-management app with block-based outliner, bi-directional links, graph view, PDF annotation, whiteboards, and real-time collaboration (DB version beta)

Community

Links

Visit Community

Details

License

Libre — AGPL-3.0 (github.com/logseq/logseq)

Dev Status 🟢 Active

Dev Status Detail

Released (file-graph version); Beta (DB version + RTC)

Owner

Logseq Inc. (Tienson Qin, CEO & founder)

Country

USA (incorporated) / China (founder origin)

Start Year 2018

Stack

ClojureScript + JVM + TypeScript (DB version adding Rust) + Electron

Funding

VC ($4.1M Series A, May 2022) + Open Collective

Last Investigated Mar 9, 2026

Use Case Domains

Co-Creation & Knowledge

Platform Evolution & Sovereignty

Affordances

Local-first storage

Version history

Interoperable formats

Data portability

Decentralized Application Attributes

Origins

Knowledge Base; inspired by Roam Research, Org Mode, Tiddlywiki, Workflowy

Database

File-based (Markdown/Org-mode) → SQLite (DB version) + CRDTs (RTC)

Query Language

Datalog (custom dialect)

Data Formats

Markdown + Org-mode + JSON

Collaborative Live Editing

Yes (alpha via RTC in DB version)

Rich Text Editing

Yes (block-based outliner with 20+ content types)

Mobile Support

Yes (iOS App Store, Android F-Droid + DB app alpha)

Web Support

Yes (test.logseq.com for DB version)

Native Apps

Yes (Electron: Windows, macOS, Linux)

Terms

Free + open source (AGPL-3.0); Logseq Sync paid service

Funds

$4.1M (Series A)

Based On

File-based architecture, no specific protocol dependency

Use Case Category

Knowledge Management + Note-taking + PKM

User Interface Type

Document-centric (outliner) + Graph-based

Offline Capabilities

Full functionality offline (100% offline, especially file version)

Collaboration Features

Real-time editing (alpha RTC in DB version), PDF annotation, graph sharing

Data Portability

Full export (Markdown, Org-mode, JSON; files on disk in standard formats)

Integration Ecosystem

Plugin marketplace (100+ plugins), Zotero integration, Excalidraw whiteboards

Web2 Data Export

Partial (import from Roam Research via community tools)

Prosocial Coherence

N/A

Economic Flows

N/A

Governance & Decision Making

Company-controlled (Logseq Inc.) + open-source community

Media / Publishing

Yes (PDF annotation, whiteboards, Excalidraw, image embedding)

Knowledge Management

Yes (core: outliner, bidirectional links, graph view, Datalog queries, backlinks)

Sensemaking

Yes (graph visualization, Datalog queries, connected references)

Project Management

Yes (tasks/TODO, flashcards, Kanban via plugins)

Data Sovereignty

Full (file version: plain Markdown/Org on user filesystem; DB version: local SQLite)