Local-first markdown note-taking application. Every note is a plain .md file on your filesystem. No cloud requirement, no proprietary format, no vendor lock-in.
The community plugin ecosystem hit 2,690+ entries by April 2026. AI is not built in; it arrives through plugins like Smart Connections and Copilot, which run against your own API keys (Claude, OpenAI frontier models, Gemini, or local models via Ollama).
Core app is free for personal use. Optional add-ons: Sync ($4/mo annual), Publish ($8/mo), Commercial license ($50/user/year).
System Verdict
Pick Obsidian if data ownership, privacy, and extensibility are hard requirements. key, you get semantic search and RAG chat grounded in your vault without paying a platform tax.
Skip it if you want AI that works out of the box or real-time team collaboration. Notion AI is plug-and-play with workspace context for teams. NotebookLM handles single-source document Q&A for free with no setup. Obsidian’s learning curve is real; the plugin ecosystem requires configuration time most casual users won’t invest.
Who pays what: Free for personal use indefinitely, Sync $4/mo (annual) or $5/mo (monthly) for end-to-end encrypted cross-device sync, Publish $8/mo for publishing notes as a website, Commercial $50/user/year for business use. AI plugins are free; the cost sits in the LLM bill.
Key Facts
| Storage model | Local plain-text .md files · any filesystem, any cloud drive |
| Plugin ecosystem | 2,690+ community plugins (April 2026) · all free |
| Top AI plugins | Smart Connections (semantic search + RAG chat) · Copilot (vault-wide LLM chat) · Text Generator (writing) |
| AI model access | Bring your own API key · Claude · OpenAI frontier models · Gemini · local Ollama · OpenRouter |
| Core pricing | Free for personal use · no feature restrictions |
| Sync add-on | $4/mo (annual) · $5/mo (monthly) · end-to-end encrypted · 10GB |
| Publish add-on | $8/mo (annual) · $10/mo (monthly) · publishes vault as a website |
| Catalyst | $25 one-time supporter license · early beta access · community badges |
| Commercial license | $50/user/year · required for business use |
| Edu/nonprofit discount | 40% off Sync and Publish |
| Platforms | Windows · macOS · Linux · iOS · Android · web vault |
| Graph view · backlinks · canvas | All core features · no plugin required |
| Dataview plugin | SQL-like queries over note frontmatter and content |
| Collaboration | None native · single-user focus |
Every data point verified on 2026-05-13 against obsidian.md/pricing and obsidian.md/plugins.
What it actually is
A plain-text markdown editor with a deep plugin ecosystem wrapped around it. Notes are .md files on your disk. The editor adds wiki-style linking, a graph view, backlinks, canvas, and a community plugin marketplace.
AI is not a core feature. The plugins that add it (Smart Connections, Copilot, Text Generator) use your own LLM API keys. You pay the LLM provider directly. Your vault content never touches Obsidian’s servers unless you enable Sync.
Sync is end-to-end encrypted. Publish turns selected notes into a read-only website. Neither is required for the core app to work.
The moat is data ownership and file portability. Every competing note tool locks content inside a proprietary database or cloud format. Obsidian’s files work in any text editor, any cloud drive, any script. That is the single reason PKM practitioners, researchers, and long-term knowledge builders pick it over Notion.
When to pick Obsidian
- Data ownership matters. Notes stay as plain files. Works offline. Survives vendor shutdown. Back up with
rsync. - You run a PKM methodology. Zettelkasten, PARA, MOC, evergreen notes: graph view and backlinks are purpose-built for linked-note workflows.
- You want AI on your own keys. Smart Connections and Copilot plug into Claude, OpenAI frontier models, Gemini, or local Ollama. No per-seat platform fee.
- You need a knowledge base that survives decades. Markdown is a 20-year-old format.
.mdfiles will open in 2046. - You’re on JetBrains/Xcode/Neovim and prefer configurable tools. Obsidian’s plugin model fits power-user tastes the way Notion’s WYSIWYG never will.
When to pick something else
- Team collaboration or real-time editing: Notion AI. Obsidian is single-user by design.
- Zero-config AI: Notion AI bundles models into the subscription. Obsidian requires API keys and plugin setup.
- Free single-document Q&A: NotebookLM. Better for focused research sessions on specific source sets.
- Outliner-style notes: Logseq. Similar local-first ethos with a block-level outliner interface.
- Polished mobile-first note-taking: Apple Notes or Bear. Obsidian mobile is functional but less polished.
Pricing
Pricing via obsidian.md/pricing.
| Plan | Price | Who’s it for |
|---|---|---|
| Personal | $0 | Any user · full app · unlimited notes · all community plugins |
| Sync | $4/mo (annual) · $5/mo (monthly) | Anyone syncing across devices · E2E encrypted · 10GB |
| Publish | $8/mo (annual) · $10/mo (monthly) | Bloggers · researchers · anyone turning notes into a site |
| Catalyst | $25 one-time | Supporters wanting early beta + community badges |
| Commercial | $50/user/year | Any business use · same features as Personal |
Prices verified 2026-05-13 via obsidian.md/pricing. Educational and nonprofit users get 40% off Sync and Publish. AI plugin costs are separate: most plugins are free, but LLM API usage (Claude, OpenAI frontier models, Gemini) is billed by the model provider.
Against the alternatives
| Obsidian | Notion AI | NotebookLM | |
|---|---|---|---|
| Storage | Local .md files | Cloud workspace | Cloud source sets |
| AI access | Plugin + your API key | Bundled at $20/user/mo (Business) | Free Google account |
| Team collaboration | None | Real-time + permissions | Single-user Q&A |
| Plugin ecosystem | 2,690+ · all free | Limited | None |
| Graph view / backlinks | Strongest | Basic backlinks | None |
| Data ownership | Full (plain files) | Vendor-hosted | Vendor-hosted |
| Learning curve | Steep | Gentle | Minimal |
| Best viewed as | Power-user knowledge base | Team workspace with AI | Free research assistant |
Failure modes
- AI is not built in. Every AI feature requires a plugin plus your own API key. Setup takes real time. For zero-config AI, Notion or ChatGPT are faster starts.
- Learning curve is steep. Graph view, Dataview queries, templating, plugin configuration all require time investment. Casual note-takers often bounce off.
- No real-time collaboration. Single-user by design. Team workflows need a separate tool or a shared git repo with conflict-management discipline.
- Mobile apps trail desktop. iOS and Android function but plugin support and performance lag the desktop experience, especially on large vaults.
- Sync costs money. Official Sync is $4/mo (annual). Free alternatives like iCloud or Syncthing cause markdown file conflicts on concurrent edits.
- Plugin quality is uneven. 2,690 plugins means long-tail abandonment. Plugins with active maintenance should be the baseline; check last-commit dates before adopting.
- Dataview is not a database. Query plugin is powerful but slow on vaults above ~10,000 notes. Real knowledge-base workloads benefit from external tools like SQLite bridges.
- Commercial license enforcement is honor-based. No technical block on business use, but using Personal commercially violates the license. Budget for $50/user/year if the vault is for work.
Methodology
This page was produced by the aipedia.wiki editorial pipeline, an automated system that ingests vendor documentation, verifies pricing and model details against primary sources, and generates the editorial analysis you are reading. No individual human wrote this review. Scoring follows the four-dimension rubric at /about/scoring/ (Utility × Value × Moat × Longevity, unweighted average). Last verified 2026-05-13 against obsidian.md/pricing, obsidian.md/plugins, and help.obsidian.md.
FAQ
Is Obsidian free? Yes for personal use. All 2,690+ community plugins are free. Paid add-ons are Sync ($4/mo annual or $5/mo monthly), Publish ($8/mo annual or $10/mo monthly), Catalyst ($25 one-time supporter license with early beta access), and the Commercial license ($50/user/year) for business use. Educational and nonprofit users get 40% off Sync and Publish.
Does Obsidian have built-in AI? No. AI arrives through community plugins. Smart Connections provides semantic search and RAG chat. Copilot provides vault-wide LLM chat. Text Generator handles AI writing. All use your own API keys from providers like Anthropic (Claude), OpenAI (OpenAI frontier models), Google (Gemini), or local Ollama models.
How does Obsidian sync? Obsidian Sync ($4/mo annual, $5/mo monthly) offers end-to-end encrypted sync across devices with 10GB storage. Free alternatives like iCloud, Dropbox, or Syncthing work but risk markdown file conflicts on concurrent edits.
What’s the difference between Smart Connections and Copilot? Smart Connections focuses on semantic search over your vault plus AI chat grounded in embeddings of your notes. Copilot is a ChatGPT-style chat interface inside Obsidian that can reference specific notes as context. Most power users install both.
Do I need the Commercial license? Yes, if you use Obsidian for business purposes and your organization has more than a single person. Personal use (including freelance work on your own behalf) does not require the Commercial license. At $50/user/year it is priced as a low-friction honor-system fee rather than a per-seat SaaS cost.
Sources
- Obsidian pricing: current tiers and add-on rates
- Obsidian plugins: community plugin directory (2,690+)
- Obsidian help: documentation
- Obsidian forum: community discussions
