
Writing & notes
atomic
A personal knowledge base that grows connections between notes
★ 1.9k
August 2026
MIT
Writing & notes
What it does
Markdown notes with linking and search, self-hosted via Docker or run on the vendor's cloud at your own subdomain, with an iOS app alongside. The choice between the two decides where your notes live, which is the question worth settling before you accumulate a few thousand of them. Free tiers and pricing change; check the current terms before committing. MIT.
Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.
Screenshots & visuals




Before you start
- Setup difficultySome setup needed
- Command lineRequired
- API keyRequired
- Sends data onlineYes
Judged automatically from the project's own metadata. Always confirm on the official page.
atomic FAQ
- Is atomic free?
- atomic itself is free, but it needs an API key for an external AI service. That service charges separately, though some have a free tier.
- Do I need to install anything or write code to use atomic?
- It needs the command line. If you are not comfortable typing commands, expect to get stuck during setup.
- Does atomic work on a phone?
- No. It needs a computer.
- Can I use atomic commercially?
- The licence is MIT, which permits commercial use. Conditions such as keeping the copyright notice still apply, so read the licence text before shipping it inside something.
How it compares
The conditions that decide whether you can actually use it, side by side.
| Tool | Command line | API key | Sends data out | Phone | Commercial use |
|---|---|---|---|---|---|
| atomic (this page) | Required | Required | Yes | No | Yes |
| SillyTavern | Required | Required | Yes | No | Yes |
| deepwiki-open | Required | Required | Yes | No | Yes |
| novel | Required | Required | Yes | No | Yes |
"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.