Notion vs Obsidian vs Logseq: Which Knowledge Management App Is Best in 2026?

There's no universal winner. Notion is best for team collaboration and shared databases; Obsidian is best for personal knowledge management with its link graph and 1,500+ plugins; Logseq is best for daily-note outlining and is completely free and open-source. The deciding question is whether you need real-time team collaboration (Notion) or local-first data ownership (Obsidian or Logseq).