Obsidian for technical note-taking at scale —

Overview

Obsidian is a Markdown-based note-taking app that stores everything as plain text files in a local folder. No database, no cloud dependency, no vendor lock-in. The graph view visualizes connections between notes. The plugin ecosystem extends it into a full knowledge management system.

After using it for 18 months to store architecture decisions, meeting notes, and technical research, here’s what works, what doesn’t, and where the tool breaks down.

What Works

Local-first storage. Every note is a Markdown file. You can read, search, and edit them with any tool. This is the single most important feature. When your notes are in a database or a proprietary format, you’re locked in. When they’re Markdown files, you own them forever.

Backlinks. The bidirectional link system is the core insight. When you link from note A to note B, note B shows you that A links to it. This creates a web of connections that surfaces related context you forgot you had.

Dataview plugin. The Dataview plugin turns your vault into a queryable database. You can write queries like “show me all meeting notes from Q4 2025 that mention ‘llm’” and get results. This is where Obsidian transitions from a note-taking app to a knowledge management system.

Where It Breaks

Plugin quality is inconsistent. The core app is stable. The plugin ecosystem is not. Some plugins are well-maintained and production-quality. Others are abandoned, broken after core updates, or have security issues. You need to vet every plugin before installing it.

Graph view is decorative, not analytical. The graph view looks impressive in presentations but is not a useful navigation tool for a large vault. It shows connections but not relevance. A note with 200 backlinks looks the same as one with 2 backlinks.

Search is basic. Obsidian’s built-in search is file-based text search. It works but lacks the sophistication of a proper search engine. The Dataview plugin helps but requires writing queries. For a vault with 2000+ notes, search becomes a bottleneck.

Sync is not built-in. Obsidian Sync is expensive ($8/month per user). The free alternatives (Git, Syncthing, iCloud) work but require manual setup. Git sync is the most reliable but introduces merge conflicts when two devices edit the same note.

The Vault Structure

My vault has this structure:

vault/
├── 0-inbox/          # Unprocessed notes, quick captures
├── 1-projects/       # Active project notes
├── 2-architecture/   # Architecture decisions and system designs
├── 3-meetings/       # Meeting notes organized by date
├── 4-research/       # Deep-dive research and learning logs
├── 5-resources/      # Reference material, cheat sheets
└── templates/        # Note templates

The numbered prefixes ensure consistent folder ordering. The Dataview plugin queries each folder for active items and surfaces them on dashboards.

Verdict

Obsidian is the best local-first note-taking tool available. The Markdown storage, backlinks, and plugin ecosystem make it uniquely suited for technical knowledge management. But the plugin ecosystem requires curation, and the search capabilities are inadequate for large vaults. If you’re willing to invest time in maintaining your setup, it’s worth it. If you want something that works out of the box, look elsewhere.