OutWiker vs Zim
A side-by-side comparison of two self-hosted wikis & documentation options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | OutWiker | Zim |
|---|---|---|
| Deploy effort | Read-the-docs project | Read-the-docs project |
| Health score | 77 · Good | 83 · Excellent |
| Category | Wikis & Documentation | Wikis & Documentation |
| License | GPL-3.0 | GPL-2.0 |
| Language | Python | Python |
| Setup difficulty | Easy | Easy |
| Min. RAM | 256 MB | 128 MB |
| Deployment | binary, source | binary, source |
| GitHub stars | ★ 331 | ★ 2,202 |
| First released | 2010 | 2008 |
| Replaces | Notion, OneNote | OneNote, Notion |
What are OutWiker and Zim?
OutWiker
OutWiker is a cross-platform desktop application for storing notes and knowledge in a tree structure, functioning as a personal wiki. Each page can use wiki markup, HTML, or Markdown, and plugins extend its capabilities.
- Tree-structured pages
- Multiple markup modes
- Plugin support
- Cross-platform desktop app
Zim
Zim is an open-source desktop application that works as a graphical text editor for maintaining a collection of wiki pages. Each page is a plain text file, making it a portable personal knowledge base.
- Desktop wiki application
- Plain text page files
- Plugin system
- Works fully offline
OutWiker vs Zim: key differences
Both projects are written in Python. Licensing differs — GPL-3.0 for OutWiker versus GPL-2.0 for Zim. Zim is the lighter option, starting around 128 MB of RAM against 256 MB for OutWiker. Zim is the more established project (first released 2008), while OutWiker arrived in 2010. Zim has the considerably larger community, at 2,202 GitHub stars versus 331.
Why pick each one
Choose OutWiker if…
- Released under the GPL-3.0 license
- Easy to set up — beginner-friendly
- Written in Python
- Tiny footprint — runs in 256 MB RAM
Watch out for
- Desktop only
- No built-in collaboration
Choose Zim if…
- Truly portable notes
- No server needed
Watch out for
- Desktop only
- No built-in multi-user mode
Frequently asked questions
Is OutWiker or Zim better?
Neither is universally better. Zim has the larger community; both share a easy setup difficulty, so the decision comes down to features and licensing.
Are OutWiker and Zim free and open-source?
Yes. OutWiker is licensed under GPL-3.0 and Zim under GPL-2.0. Both can be self-hosted at no software cost.
Can I run OutWiker and Zim with Docker?
OutWiker: check the project docs for container support. Zim: check the project docs for container support.
Which is lighter on resources, OutWiker or Zim?
Zim has the smaller minimum footprint at 128 MB of RAM, compared to about 256 MB for OutWiker. Real-world usage depends on library size, user count, and enabled features.