Obsidian

Obsidian is a note-taking app for organizing ideas and connecting related notes. It stores notes on the device as plain-text Markdown files, which remain accessible without an internet connection. Its Graph view displays relationships formed by internal links, and Canvas offers an open space for arranging notes alongside attachments and web pages. The app includes core plugins and supports community plugins, themes, and an open API for customization. The Web Clipper is available for Chrome, Safari, Firefox, Edge, Brave, Arc, Orion, and Vivaldi. Obsidian has a free plan with no sign-up required. Optional Sync plans add syncing: Sync Standard provides 1 GB of storage and a 5 MB maximum file size, while Sync Plus provides 10 GB and a 200 MB maximum file size. Obsidian says Sync uses AES-256 end-to-end encryption, and its security page lists third-party audits of the clients and Sync service. Publish hosts wikis, knowledge bases, documentation, or digital gardens, with hosting for a site up to 4GB. Listed platforms include Android, iOS, Linux, macOS, and Windows.

Obsidian centers on local Markdown notes, with linking and Canvas tools for organizing material. The free app works offline, while Sync and Publish are optional services with listed storage and hosting limits.

Obsidian suits people who want local, offline notes and ways to connect related ideas. Its plugins, themes, API, and optional publishing and sync plans offer additional choices for customization and sharing.

Obsidian is a note-taking app for people who want to build connections between their notes rather than keep them as isolated documents. Its strongest appeal is a local, offline-ready Markdown collection that users can shape with links, Canvas, and extensions; syncing and publishing cost extra.

Overview

Notes stay on the device as plain-text Markdown files and remain accessible offline. That makes Obsidian a strong fit for readers who value local files and dependable access without an internet connection. The trade-off is that syncing is a paid add-on, so anyone who wants a shared vault across devices must budget for a separate plan.

Key features

Links, Graph, and Canvas

Internal links connect notes, and Graph view visualizes those connections. The graph can help make relationships visible in a substantial, interlinked collection, but is less compelling for readers who mainly want a simple list of notes. Canvas provides an infinite space to arrange notes and connect them with attachments and web pages, offering a more spatial way to work alongside conventional note documents.

Customization and capture

Team-built core plugins, community plugins, themes, and an open API provide substantial room to tailor the app. That flexibility suits users who want to build a personal workflow, though it is more than someone seeking a fixed, minimal note-taking tool may need. Web Clipper supports Chrome, Safari, Firefox, Edge, Brave, Arc, Orion, and Vivaldi, so users of those browsers can capture material into their Obsidian workflow.

Sync security

Obsidian says Sync uses AES-256 end-to-end encryption, and its security page lists third-party audits of the clients and Sync service. That is a meaningful security feature for people considering paid synchronization, though the storage and file-size caps still matter when choosing a tier.

Pricing

The core Obsidian app costs nothing, with no sign-up required and no strings attached. It is free for commercial use, although organizations using it for work are encouraged to buy the optional Commercial license.

• Sync Standard: $5 a month, per user, billed monthly. It covers one synced vault, 1 GB total storage, a 5 MB maximum file size, and one month of version history. This is the lower-cost fit for an individual syncing a modest vault; the storage, file-size, and history limits make it less suitable for large attachments or deeper version recovery.
• Sync Plus: $10 a month, per user, billed monthly. It includes 10 synced vaults, 10 GB storage, a 200 MB maximum file size, and 12 months of version history, with an option to upgrade to 100 GB storage. It is the better fit for users with multiple vaults, larger files, or a need for longer version history, at twice Standard's monthly price.
• Publish: $10 a month, per site, billed monthly. It hosts a site up to 4GB and includes a customizable theme and domain plus priority email support. This is for users who want to publish a wiki, knowledge base, documentation, or digital garden; it does not replace Sync for keeping vaults synchronized.
• Catalyst: $25, paid once. The one-time purchase includes early access to beta versions, community badges, and exclusive channels. It suits users who want those community and beta-access benefits rather than a hosting or sync quota.
• Commercial: $50 a year, per user, billed yearly. It supports development and makes the organization a featured organization. The free app remains usable commercially, while this paid option is intended for organizations choosing to purchase a license.

Obsidian directs users to Discord for help and questions, and to its forum for feature requests, bug reports, and discussions.

Platforms

Obsidian supports Android, iOS, Linux, macOS, Windows, and an extension. That spread suits readers who use different desktop and mobile systems, while the free app's local storage means cross-device access alone does not provide synchronization.

Who it's for

Obsidian is best for people building a connected personal knowledge base who value local Markdown files, offline access, and control over customization. It is a weaker fit for readers who need included syncing, or who want a straightforward note list without managing links, plugins, or a custom setup.

Pros and cons

• Pro: Plain-text Markdown files remain on the device and available offline, supporting local access without an online workspace.
• Pro: Internal links, Graph view, and Canvas offer distinct ways to connect and organize material.
• Pro: Core and community plugins, themes, and an open API provide extensive customization options.
• Con: Sync is a separate subscription, and Standard's 1 GB storage and 5 MB file limit can constrain attachment-heavy vaults.
• Con: The flexibility can be unnecessary overhead for people who want a simple, predefined note-taking workflow.

Alternatives

For readers comparing software in this category, see Executable Packers.

• StarForce Reader is a free alternative with Android, iOS, Linux, macOS, and Windows support.
• Virbox Protector is a paid alternative with a free trial and support across Android, iOS, Linux, macOS, and Windows.
• AlushPacker is a free Windows alternative.
• Enigma Virtual Box is a free Windows alternative.
• MPRESS is a free alternative for macOS and Windows.
• UPX is a free alternative for Linux, macOS, and Windows.
• Dhaedalida is a freemium Windows alternative.
• Sentinel EMS is a paid alternative with a free trial and support for API, Linux, macOS, self-hosted, web, and Windows.

Verdict

Choose Obsidian if you want an offline-ready, locally stored Markdown knowledge base that you can connect and customize on your own terms. The core app's no-cost access is compelling, but readers who expect synchronization or hosted publishing to be included should look elsewhere or account for the additional monthly plans.