What It Is

Obsidian is a markdown-based note-taking app launched in March 2020 by Shida Li and Erica Xu. Positioned as a “second brain” tool, Obsidian combines local-first storage, bidirectional linking, graph views, and an extensive plugin ecosystem. It became the primary competitor to Roam Research and a favorite among developers, writers, and PKM (Personal Knowledge Management) enthusiasts.

By 2023, Obsidian had 1+ million users and a thriving community despite being free for personal use.

Key Philosophy

Your notes, your files – Everything is stored as plain markdown (.md) files on your local computer. No vendor lock-in, no cloud dependency (unless you opt-in to Obsidian Sync).

Future-proof – Markdown is human-readable and will work forever. Even if Obsidian disappears, your notes remain accessible.

Extensible – Open plugin API lets community developers add features (unlike Roam’s closed system).

Core Features

Bidirectional linking – [[WikiLinks]] auto-create backlinks

Graph view – Visualize note connections (local and global)

Markdown editor – Clean, distraction-free writing

Folder & tag organization – Flexible structure (unlike Roam’s flat daily notes)

Search – Full-text search across all notes

Templates – Create note templates for journaling, meeting notes, etc.

Canvas (2022) – Visual whiteboard for connecting notes

Community plugins – 1,000+ plugins for calendars, Kanban boards, spaced repetition, etc.

Why It Won

Obsidian succeeded where others struggled:

Free for personal use – Commercial use requires $50/year, but individuals pay nothing (vs Roam’s $15/month)

Local storage – Privacy-conscious users loved owning their data

Speed – Faster than Roam for large vaults (10,000+ notes)

Plugin ecosystem – Community-built extensions for every niche need

Git-friendly – Developers sync vaults via GitHub

Cross-platform – Windows, Mac, Linux, iOS, Android

Popular Plugins

Must-have community plugins:

• Dataview – Query notes like a database
• Calendar – Visual monthly calendar
• Kanban – Trello-style boards in notes
• Templater – Advanced template system
• Excalidraw – Draw diagrams in notes
• Daily Notes (core plugin) – Auto-generate daily journal pages

Community & Culture

Obsidian fostered a passionate community:

• r/ObsidianMD (2020+) – 100,000+ Reddit users sharing vaults
• Obsidian Discord – Official community hub
• YouTube creators – “Obsidian for beginners,” vault tours, workflow demos
• Publish sites – Public digital gardens ()
• Theme designers – 200+ community themes (dark mode, minimalist, colorful)

The #ObsidianMD hashtag tracks workflows, tips, plugin discoveries, and “how I use Obsidian for X” tutorials.

Use Cases

Personal knowledge management – Zettelkasten, Second Brain (BASB) Academic research – Literature reviews, PhD notes Creative writing – Novelists tracking characters, plots, worldbuilding TTRPG game masters – D&D campaign notes, NPC tracking Developers – Code snippets, documentation, learning logs Journaling – Daily notes, gratitude, mood tracking

Roam vs Obsidian

Why users switched from Roam:

• Price – Free vs $15/month
• Local files – Own your data vs cloud-locked
• Performance – Faster for large vaults
• Plugins – Extensible vs closed ecosystem
• Privacy – Offline-first vs cloud-only

Roam still had advantages:

• Outliner-first – Better for hierarchical thinkers
• Real-time collaboration (Obsidian added this later via Sync)
• Block references – More powerful than Obsidian’s early implementation

Monetization

Obsidian is free, but offers paid services:

Obsidian Sync ($10/month) – Encrypted cloud sync across devices Obsidian Publish ($20/month) – Publish notes as a website

Many users use free alternatives (iCloud, Dropbox, Git) for syncing.

Criticism

• Learning curve – Markdown, plugins, graph view intimidate beginners
• Analysis paralysis – Too many plugins/themes, endless setup tweaking
• Productivity theater – Building vaults instead of actually writing/creating
• Overkill for most – Apple Notes or Notion work fine for 90% of people

Sources

• Obsidian: https://obsidian.md
• Obsidian forum: https://forum.obsidian.md
• r/ObsidianMD: https://reddit.com/r/ObsidianMD