Open Source Alternatives to Obsidian
Trilium Notes
A hierarchical note taking application with focus on building large personal knowledge bases.
★ 38,306 Updated: Oct 2026 Status: Active
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Notesnook
End-to-end encrypted private note-taking app
★ 14,753 Updated: Oct 2026 Status: Active
Zettlr
A Markdown Editor for Thinkers.
★ 13,758 Updated: Oct 2026 Status: Active
Dendron
Open-source local-first knowledge management
★ 7,467 Updated: Nov 2025 Status: Slowing
Bangle.io
Local-first note-taking app
★ 1,235 Updated: Oct 2026 Status: Active
Unigraph
A local-first, universal knowledge graph.
★ 767 Updated: Jun 2023 Status: Inactive