Obsidian

Overview

Obsidian is a free, local-first note-taking and knowledge app from a small independent team (co-founded by Shida Li and Erica Xu; CEO Steph Ango / kepano). Notes live as plain Markdown files in folders you control—called vaults—on your device. No account is required for the core app, and there is no telemetry by default. The product pitches itself as a private thinking space: wiki-style [[links]], graph view, Canvas, thousands of community plugins, and offline-first editing on desktop and mobile.

Unlike cloud workspaces such as Notion, Obsidian does not host your primary data unless you opt into paid Sync or Publish. The business model is explicit: the app is free without feature gates; revenue comes from optional add-ons (Sync, Publish) and optional support licenses (Catalyst for individuals, Commercial for organizations). Since February 2025, commercial use of the core app is free; the Commercial license is no longer required.

Platforms include Mac, Windows, Linux, iOS, and Android. The official Web Clipper and an open plugin API extend capture and automation. Independent security audits (Cure53 client audits; Cure53 and Trail of Bits on Sync) back the privacy claims for users who care about local data and end-to-end encrypted sync.

Key features

• Local Markdown vaults — Notes are plain .md files and folders on disk. You can open them in any editor, back them up with Git, or migrate without export lock-in.
• Bidirectional links & graph view — [[wiki-links]], backlinks, and an interactive graph map connections across a vault (personal wiki / “second brain” workflows).
• Canvas — Infinite spatial board for cards, images, embeds, and freeform layouts (research, lectures, planning).
• Properties & bases-style structure — Frontmatter properties, bases/queries, and community tools (e.g. Dataview) for structured views over notes.
• Community plugins & themes — Large ecosystem (calendar, tasks, kanban, outliner, AI bridges, etc.) via an open plugin API and community site.
• Cross-platform apps — Full desktop clients plus iOS/Android with offline edit; sync is optional (official Sync or DIY file sync).
• Obsidian Sync (paid) — Official E2E-encrypted (AES-256) multi-device sync, version history, selective sync, shared vaults for collaboration, priority support.
• Obsidian Publish (paid) — Host selected notes as a public or password-protected site (digital garden / docs / wiki) with graph, hover previews, search, custom domain, CSS themes; up to 4 GB per site.
• Web Clipper — Official browser clipper to send web content into a vault.
• Security posture — Local-first by default; Sync uses E2E encryption so Obsidian cannot read vault contents; public audit reports for clients and Sync.

Pricing

Pricing below is from obsidian.md/pricing and product pages for Sync/Publish (checked mid‑2026). Currency is USD. The core app has no monthly fee.

Product	Price	What you get
Core app	Free (no signup)	Unlimited vaults, full features, community plugins, desktop + mobile. Personal and commercial use allowed without a required license.
Sync Standard	$4/user/mo billed annually · $5/mo monthly	1 synced vault · 1 GB storage · 5 MB max file · 1 month version history · E2EE · shared vaults · priority support
Sync Plus	$8/user/mo billed annually · $10/mo monthly	10 synced vaults · 10 GB storage (upgradable toward 100 GB) · 200 MB max file · 12 months version history · same E2EE/collaboration/support
Publish	$8/site/mo billed annually · $10/mo monthly	Hosted site up to 4 GB · custom theme/domain · graph & full-text search · password protection · SEO-friendly · priority support
Catalyst	$25 one-time	Support license: early access to beta/insider builds, community badges, VIP channel. Does not include Sync or Publish.
Commercial	$50/user/year (optional)	Optional org support / featured supporter path. Not required to use Obsidian at work (since Feb 2025).

Discounts: Students, faculty, and nonprofit employees can get 40% off Sync and Publish (official discount policy). Refunds: full refund within 7 days for Sync and Publish; Catalyst, Commercial licenses, and credit are non-refundable. You can buy Obsidian Credit and gift add-ons to others.

Stacking costs example: One power user on annual billing might pay $4 Sync Standard + $8 Publish = $12/month on top of a free core. Sync Plus + Publish is $16/month annually. Catalyst is a one-time tip, not a subscription.

Limits & gotchas

• Sync storage ceilings — Standard’s 1 GB and 5 MB file cap are tight if you attach many images/PDFs/video; Plus raises limits and history depth. Check actual vault size before assuming Standard is enough.
• Not a real-time Google Docs clone — Shared vaults via Sync keep people in the same files with privacy, but multiplayer co-editing is still weaker than Notion/Google Docs; community plugins and a roadmap “Multiplayer” item exist, but team wikis often outgrow pure Obsidian.
• DIY sync tradeoffs — iCloud, Dropbox, OneDrive, Git, Syncthing, and LiveSync plugins are popular free alternatives. Common complaints: slower mobile sync, merge conflicts, missing official version history/E2EE UX, or flaky phone setups.
• Plugin risk surface — Power comes from community plugins; each plugin is third-party code. Enterprises often restrict plugin sources or mirror catalogs.
• Large vaults & mobile — Very large vaults or huge single Markdown files can feel heavy; performance depends on device and plugin load. Mobile is capable but not identical to desktop for every workflow.
• Publish is hosting, not a CMS — Great for digital gardens and docs from notes; less ideal as a full marketing site or multi-author CMS with complex workflows.
• App is free forever; services are not — Core remains free, but if you depend on official Sync/Publish, you pay ongoing fees. Data files stay portable either way.

Community sentiment

On Reddit’s r/ObsidianMD and Hacker News, praise clusters around local ownership, speed of plain-text search, the plugin ecosystem, and the “file over app” philosophy. The February 2025 “free for work” change was widely welcomed; CEO kepano clarified that Sync, Publish, and Catalyst already fund the company and that mandatory commercial licensing was confusing and hard to enforce.

Criticism is consistent and specific: some users call Sync/Publish pricey relative to “just files,” especially when every shared-vault participant needs Sync. Others happily pay for E2EE and zero-maintenance multi-device sync. DIY camps document Git, Syncthing, CouchDB LiveSync, and iCloud setups. HN threads also stress that Obsidian is closed-source (not OSS) while still user-funded and audit-backed—acceptable to most fans, a deal-breaker for a minority who want full FOSS.

Compared with Notion, the community stereotype is: Obsidian wins offline, privacy, and longevity of files; Notion wins databases, live multiplayer, and turnkey team spaces. Versus Logseq and other local Markdown tools, Obsidian usually wins on polish, Canvas, and plugin breadth; block-outliner fans may prefer Logseq’s daily-note-first model.

Who should use it

• Writers, researchers, students who want a durable personal knowledge base in plain text.
• Privacy- and offline-first users who refuse cloud lock-in for primary notes.
• Tinkerers who enjoy plugins, custom CSS, and building workflows (tasks, Zettelkasten, PKM dashboards).
• Individuals at work who need a private thinking tool (now clearly free for commercial use of the core app).
• Publishers of digital gardens / public wikis who already live in Obsidian and want one-click Publish.

• Skip or pair with something else if you need heavy real-time team docs, CRM-style databases as a product, or zero learning curve for non-technical teammates—then Notion, Confluence, or a dedicated wiki may fit better, with Obsidian kept for personal notes.

Alternatives

• Notion — Cloud workspace with databases, AI, and strong multiplayer; weaker offline/local ownership.
• Logseq — Local-first outliner (Markdown/Org); open-source ethos; different block model than Obsidian’s file-first notes.
• Anytype / Capacities — Object-oriented local or local-ish knowledge apps; less mature plugin ecosystems than Obsidian.
• Joplin — Open-source notes with optional sync; simpler linking/graph than Obsidian.
• Bear / Apple Notes — Simpler Apple-centric notes if you do not need a graph or plugins.
• Static site generators (Quartz, Hugo, Emanote) + Git — Free alternative path to “publish a vault” without Obsidian Publish.

Verdict

Obsidian’s real 2026 offer is straightforward: a free, unlimited local Markdown app, with optional Sync ($4–$10/user/mo depending on Standard vs Plus and billing), Publish ($8–$10/site/mo), a $25 one-time Catalyst support license, and an optional $50/user/year Commercial badge for orgs. Pricing on the official site is transparent; the old confusion around “do I need a commercial license?” is largely gone after the free-for-work change.

Choose Obsidian if you value file ownership, offline reliability, and deep customization. Budget only for Sync when multi-device E2EE convenience beats DIY, and for Publish when you want your vault on the web without running your own host. Do not buy Catalyst expecting paid features—buy it to fund the team. For collaborative team wikis with live co-editing, treat Obsidian as a personal tool and pick a team product for shared work.