1
Obsidian Free

Local-first markdown note-taking app with bidirectional linking and a plugin ecosystem.

Free Individuals who want local-first, markdown-based notes
Markdown Backlinks Graph View Plugins
2

Networked note-taking tool with bidirectional links and graph-based knowledge management.

Paid from $15/mo Researchers and writers who think in networks
Backlinks Graph View Daily Notes Block References
3
Notion Free tier

All-in-one workspace for notes, docs, wikis, project management, and databases.

Free for personal use, limited blocks · Paid from $8/user/mo Teams that want docs, wikis, and project tracking in one tool
Docs Databases Wiki Templates

Quick comparison: Logseq vs Obsidian

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