Side by side
Fern vs VitePress
Both stand on knowledge base software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan Open source APILinuxMac+3
Fern combines API documentation publishing with client library generation and offers a defined Free plan. Teams considering it should check the free-tier limits and note that self-hosting is reserved for Enterprise.
Visit Fern
Free plan Open source APILinuxMac+3
VitePress offers a Markdown-based workflow with Vue customization and static HTML output, at no listed software cost. Its Node.js requirement and server-side rendering constraint are important considerations for setup and theme development.
Visit VitePressThe facts
| Fern | VitePress | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Yes | Yes |
| Runs on | API, Linux, Mac, Self-hosted, Web, Windows | API, Linux, Mac, Self-hosted, Web, Windows |
| Lowest paid plan | Free or on request | Free or on request |
| Plans published | 2 | 2 |
| Maker | Not published | Not published |
| Website | buildwithfern.com | vitepress.dev |
| On knowledge base software | #1 of 138 | #2 of 138 |
Fern: what it does well
- Generates API references from several specification formats.
- Includes interactive API Explorer.
- Free plan includes one site.
- Supports SSO, JWT, and OAuth access controls.
- Supports custom domains and version history.
What to know first
- Free plan is limited to one site.
- Free plan has 10 team members.
- Free plan includes 250 AI credits monthly.
- Self-hosting is an Enterprise capability.
VitePress: what it does well
- Free under the MIT License
- Markdown supports tables and syntax highlighting
- Markdown pages can use Vue components
- Supports custom themes and dynamically generated routes
- Deployment guidance covers multiple hosting services
What to know first
- Requires Node.js version 22 or higher
- Custom theme code must support server-side rendering
- Linked documentation includes an alpha version
Alternatives to Fern Alternatives to VitePress The whole list