---
title: "Lumen"
pageType: "tool-profile"
schemaVersion: "1.0"
snapshotId: "tv-20261031-f39b578e7aea"
generatedAt: "2026-10-31T07:01:50.000Z"
canonicalUrl: "http://toolvitals.com/tools/lumen/"
jsonUrl: "http://toolvitals.com/api/agent/tools/lumen"
indexable: true
---

# Lumen

A free, open-source note-taking app that syncs with markdown files in your GitHub repository

## Decision context

- Status: critical
- ToolVitals score: 20/100
- Health score: 34/100
- Shipping score: 0/100
- Score mode: verdict
- Data confidence: 90/100
- Source coverage: 75/100
- Last evidence check: 2026-10-31

## Classification

- Use case: Notes & Knowledge Base (notes-knowledge-base)
- Category: Notes & Knowledge (note-taking)
- Tool mode: Source-visible project
- Openness: OSI-approved OSS
- License: MIT
- Tags: open-source, git, local-first, markdown, note-taking, pkm, zettelkasten, personal-knowledge-management, git-sync, github-sync

## Public repository signals

- Repository: [lumen-notes/lumen](https://github.com/lumen-notes/lumen)
- Stars: 720 (adoption context only)
- Forks: 48
- Open issues: 55
- Last commit date: 2026-10-28
- Releases in 90 days: 0

## Source receipts

- [Official website](https://uselumen.com/) — checked 2026-10-31
- [Source repository](https://github.com/lumen-notes/lumen) — checked 2026-10-31

## Discovery status

- Search indexable: yes
- Reason: sufficient tool evidence

## Interpretation limits

- ToolVitals scores summarize bounded public maintenance, shipping, openness, and evidence signals. They are not user-review ratings.
- GitHub stars and related popularity metrics are adoption context, not quality evidence.
- Missing values mean not collected or not confidently established; they do not mean zero.
- Public signals do not prove security, uptime, support quality, customer satisfaction, or production suitability.
- Verify material decisions against the linked first-party sources and your own requirements.