About Codex
Codex is a premium Ghost theme for documentation, knowledge bases, and API reference sites. Built by KONTEMI.
What is Codex?
Codex transforms Ghost CMS into a professional documentation platform. If you have ever admired the documentation at Stripe, Vercel, or Tailwind CSS — Codex gives you that same experience on Ghost.
No static site generators. No Git-based workflows for content updates. No React. Just Ghost's powerful editor, a purpose-built theme, and documentation that looks incredible.
Features
3-Column Documentation Layout
Sidebar navigation on the left, content in the center, table of contents on the right. Responsive — collapses gracefully on tablet and mobile.
IBM Plex Typography
IBM Plex Sans for prose, IBM Plex Mono for code. Designed for technical content with excellent readability and clear visual hierarchy.
Code Copy Buttons
One-click copy on every code block. Developers expect this — Codex delivers it without plugins.
Hierarchical Navigation
Ghost tags become documentation sections. Posts become pages within sections. The sidebar groups and orders content automatically.
Built-in Membership
Gate premium documentation behind Ghost's native membership tiers. Free users see getting started guides, paying members get the full reference.
Dark Mode
System-preference dark mode with manual toggle. Every component, code block, and card is styled for both modes.
Full Ghost Card Support
Callouts, toggles, bookmarks, galleries, buttons, headers — every Ghost editor card is styled to match the documentation aesthetic.
Comparison
| Feature | Codex | GitBook | ReadTheDocs | Docusaurus |
|---|---|---|---|---|
| Self-hosted | Yes | No | Yes | Yes |
| Visual editor | Yes | Partial | No | No |
| Membership | Built-in | Enterprise | No | No |
| API access | Full REST | Limited | No | No |
| Custom branding | Full | Limited | Limited | Full |
| Price | $79 one-time | $8/user/mo | Free | Free |
Built by KONTEMI
KONTEMI builds premium Ghost themes for teams that need more than a blog. Our themes power documentation portals, online academies, SaaS landing pages, and editorial publications.
Every theme includes a living component showcase, full membership integration, and obsessive attention to typography and whitespace.
Other Themes
- Academy — online course platform with progress tracking
- Cortex — dark editorial theme for AI/tech publications
- Catalyst — consultancy theme for advisory firms
- Beacon — directory and resource listing platform