Obsidian
Markdown files on your disk, with a graph view and 2,000 plugins on top.
What is Obsidian?
Obsidian is a local-first knowledge tool that stores every note as a plain Markdown file in a folder on your machine. There is no cloud lock-in, no proprietary format and no vendor that can see your notes, including Obsidian itself. A large plugin ecosystem and a graph view turn the folder of files into a personal wiki you actually own.
Markdown-native, local-first, docs, notes, and knowledge tools that are easy for people and AI agents to read.
See the full Markdown & Knowledge guide to compare more tools, buyer criteria, and related workflows.
Use cases to evaluate
Personal second brain with backlinks, daily notes and a graph view of how ideas connect
Researcher or PhD student building a literature database in plain Markdown files
Founder keeping private strategy docs and journal entries that never touch a cloud server
Engineer writing documentation in Markdown that lives alongside the code in a Git repo
Fit to evaluate
Solo knowledge workers, writers, researchers and consultants
Privacy-conscious users who refuse cloud-only note tools
Developers comfortable with Markdown, plugins and a bit of YAML
Anyone who has been burned by a notes app shutting down or changing its format
Business fit
Right for you if you want long-term ownership of your notes, prefer Markdown over WYSIWYG editors, and treat your knowledge base as infrastructure rather than a SaaS subscription. Skip if you need real-time multiplayer editing, if your team needs a shared workspace with permissions, or if you don't want to spend an afternoon configuring plugins and themes before you can take your first useful note.
How to evaluate Obsidian
Use this category when knowledge is scattered across chats, private documents, and tribal memory.
Confirm the exact workflow
Map Obsidian to one concrete workflow first, such as personal second brain with backlinks, daily notes and a graph view of how ideas connect. Avoid buying before the owner, trigger, output, and success metric are clear.
Check category fit
Compare file portability, linking, search, permissions, and export options.
Compare practical alternatives
Shortlist Obsidian against Logseq, Roam Research, Tana so the decision is based on fit, effort, and workflow ownership rather than brand recognition alone.
Validate cost and rollout effort
Free forever for personal use, no sign-up required. Commercial License is $50 per user per year, optional but encouraged for organizational use. Sync (end-to-end encrypted) is $4 per user per month annual or $5 monthly. Publish is $8 per site per month annual or $10 monthly. Catalyst is a $25 one-time payment for early beta access and community badges. Also confirm implementation time, support needs, and whether the easy setup matches your team.
Compare Obsidian with alternatives
Use this quick comparison before booking demos or moving data into a new system.
| Primary workflow | Personal second brain with backlinks, daily notes and a graph view of how ideas connect, Researcher or PhD student building a literature database in plain Markdown files |
|---|---|
| Best-fit team | Solo knowledge workers, writers, researchers and consultants, Privacy-conscious users who refuse cloud-only note tools |
| Implementation effort | Easy setup and maintenance profile |
| Pricing check | Free core app, paid add-ons (Sync, Publish) and a flat annual commercial license |
| Closest alternatives | LogseqRoam ResearchTanaCapacities |
Obsidian pricing
| Model | Free core app, paid add-ons (Sync, Publish) and a flat annual commercial license |
|---|---|
| Snapshot | Free forever for personal use, no sign-up required. Commercial License is $50 per user per year, optional but encouraged for organizational use. Sync (end-to-end encrypted) is $4 per user per month annual or $5 monthly. Publish is $8 per site per month annual or $10 monthly. Catalyst is a $25 one-time payment for early beta access and community badges. |
| Checked |
Common questions about Obsidian
What is Obsidian?
Obsidian is a local-first knowledge tool that stores every note as a plain Markdown file in a folder on your machine. There is no cloud lock-in, no proprietary format and no vendor that can see your notes, including Obsidian itself. A large plugin ecosystem and a graph view turn the folder of files into a personal wiki you actually own.
What is Obsidian used for?
Common use cases: Personal second brain with backlinks, daily notes and a graph view of how ideas connect; Researcher or PhD student building a literature database in plain Markdown files; Founder keeping private strategy docs and journal entries that never touch a cloud server; Engineer writing documentation in Markdown that lives alongside the code in a Git repo.
How much does Obsidian cost?
Free forever for personal use, no sign-up required. Commercial License is $50 per user per year, optional but encouraged for organizational use. Sync (end-to-end encrypted) is $4 per user per month annual or $5 monthly. Publish is $8 per site per month annual or $10 monthly. Catalyst is a $25 one-time payment for early beta access and community badges.
Who is Obsidian best for?
Obsidian fits Solo knowledge workers, writers, researchers and consultants, Privacy-conscious users who refuse cloud-only note tools, Developers comfortable with Markdown, plugins and a bit of YAML, Anyone who has been burned by a notes app shutting down or changing its format. Right for you if you want long-term ownership of your notes, prefer Markdown over WYSIWYG editors, and treat your knowledge base as infrastructure rather than a SaaS subscription. Skip if you need real-time multiplayer editing, if your team needs a shared workspace with permissions, or if you don't want to spend an afternoon configuring plugins and themes before you can take your first useful note.
What are alternatives to Obsidian?
Common alternatives to Obsidian include Logseq, Roam Research, Tana, Capacities, Reflect, Anytype.