Obsidian is a note-taking app that stores your notes as plain text files right on your disk. It is not just another notepad, but a tool for connecting ideas into a single network. Let us explain how it works and who it is for.

What Is Obsidian

Obsidian is a note-taking and personal knowledge management (PKM) app. Each note is a separate Markdown file (.md) stored locally on your computer, inside a folder called a vault.

Markdown is a simple way to format text using characters, so you write headings, lists or bold text without a mouse and without a toolbar. The app is fast, works offline, and runs on Windows, macOS, Linux and mobile.

Linking Notes and the Graph

This is the feature that made people fall in love with Obsidian. You connect notes with a link in square brackets (a wikilink), for example [[Data Backup]]. Just type the name of another note and a clickable link appears.

  • Connected ideas - isolated notes turn into a network where one note leads to another.
  • Graph view - a visual map showing how notes relate and where topics cluster.
  • Backlinks - for each note you see every other note that links to it.

This approach comes from the Zettelkasten method and is often called building a “second brain”. Instead of searching one long document, you assemble knowledge from small, interlinked pieces.

Your Data Stays Yours

Because these are plain .md files on your disk, you have full control over them. That is a big difference from cloud services, where your data is locked inside someone else’s system.

  • Privacy - your notes never have to leave your computer.
  • No vendor lock-in - you can open the files in any text editor even ten years from now, even if Obsidian were gone.
  • Longevity - Markdown is an open format that almost any program can read.

That is exactly why Obsidian is a good choice if long-term data ownership matters to you. It also pairs well with a sensible data backup, since local files are easy to back up.

Plugins, Themes and Sync

Obsidian can be extended significantly. Hundreds of community plugins and looks (themes) are available, adding a calendar, a kanban board, better task handling or a different design.

You can solve sync between devices in two ways:

  • Official Sync - a paid, encrypted service from Obsidian itself, the simplest option.
  • Your own setup - a cloud folder (for example Google Drive) or the Git version control system, which you configure yourself for free.

Pricing and What It Is For

For personal use, Obsidian is free. You only pay for add-ons like Sync (synchronization) and Publish (sharing notes on the web), or for a commercial license for companies.

Obsidian proves its worth for:

  • personal notes and journaling,
  • a company knowledge base and internal documentation,
  • preparing articles and content,
  • project and study notes with links.

If you are moving from paper to digital, it fits nicely into a broader paperless office.

Obsidian Versus Cloud Tools

In short: compared to cloud tools (for example Notion), Obsidian is local, fast, private and built on an open format. In exchange, you set up some parts yourself, mainly synchronization.

If real-time collaboration is enough for you and you do not want to configure anything, a cloud tool may be more convenient. If you want control, privacy and speed, Obsidian wins. It is also a great example of quality free software and alternatives to paid programs.

Conclusion

Obsidian is more than a notepad. It is a tool for building a connected knowledge network that stays with you forever, because the data lives in your own files. For personal use it costs nothing, and learning the basics takes just a few minutes.

Want help with a knowledge base or rolling out Obsidian in your company? Get in touch.

This article is part of our Software and system overview.