APIs · head to head
KeystoneJS vs MkDocs
KeystoneJS
APIs
Powerful Node.js headless CMS framework and API platform
- From
- Free
- Rated
- -
MkDocs
Documentation
Static site generator for project documentation in Markdown
- From
- Free
- Rated
- -
The short version
- Each has a real cost: KeystoneJS database support is limited to PostgreSQL, MySQL and SQLite; MkDocs no built-in versioning, which Docusaurus provides and documentation teams eventually need
- They diverge on capability: KeystoneJS covers REST API, MkDocs covers Plain Markdown.
- Prices and features above were last checked on 30 August 2026.
Where they differ
Only the attributes on which KeystoneJS and MkDocs actually diverge.
| Attribute | KeystoneJS | MkDocs |
|---|---|---|
| Pricing model | open-source | Open source, no licence fee |
| Platforms | Node.js, Self-hosted | Web, Linux, macOS, Windows |
| Category | APIs | Documentation |
| Founded | 2016 | Unknown |
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in KeystoneJS
- REST API
- GraphQL API
- Admin interface
- Node.js
- Next.js
- React
- Databases
- Node.js support
Only in MkDocs
- Plain Markdown
- Single YAML config
- Material theme
- Live preview
What people use each for
The jobs each tool is most often brought in to do.
KeystoneJS
- Headless CMS implementationnot MkDocs
- Content management systemsnot MkDocs
- Customizable API-driven applicationsnot MkDocs
MkDocs
- Project documentation for teams that would rather not run a JavaScript toolchainnot KeystoneJS
- Python projects keeping docs beside the codenot KeystoneJS
- Documentation that must build fast in CI on every commitnot KeystoneJS
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
KeystoneJS
- Database support is limited to PostgreSQL, MySQL and SQLite
- Keystone 5 is a separate legacy product documented on a different site and is not covered by the Keystone 6 docs
- Upgrading requires following a dedicated Migrate to 8.0.0 guide, so major versions are not drop-in
- Free support is a community Slack; enterprise-grade consulting and support is a separate paid engagement with Thinkmill and no published price
MkDocs
- No built-in versioning, which Docusaurus provides and documentation teams eventually need
- Extending past the theme means writing Python plugins
- Markdown only, so embedding interactive components is not the model
Pricing, plan by plan
KeystoneJS
Free- Open SourceFree
- Full KeystoneJS
- Community support
MkDocs
Free- MkDocsFree
- Full functionality
- Commercial use permitted
- Community support
Which should you pick?
Choose KeystoneJS if
- You need rest api.
- You want to start without paying.
- You work on Node.js, Self-hosted.
- You also want graphql api.
Choose MkDocs if
- You need plain markdown.
- You want to start without paying.
- You work on Web, Linux, macOS, Windows.
- You also want single yaml config.
Questions people ask
- Is KeystoneJS or MkDocs better?
- Neither clearly leads. KeystoneJS starts at Free and MkDocs at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, KeystoneJS or MkDocs?
- KeystoneJS starts at Free and MkDocs at Free.
- Does KeystoneJS or MkDocs run on more platforms?
- KeystoneJS runs on Node.js, Self-hosted. MkDocs runs on Web, Linux, macOS, Windows.
- Can I use KeystoneJS for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is KeystoneJS best used for?
- KeystoneJS is most often used for headless cms implementation, content management systems, customizable api-driven applications. Of those, headless cms implementation and content management systems are not what MkDocs is typically brought in for.
- What can KeystoneJS do that MkDocs cannot?
- KeystoneJS covers REST API, GraphQL API, Admin interface, Node.js. MkDocs covers Plain Markdown, Single YAML config, Material theme, Live preview.
Answered from the vendors’ own pages
KeystoneJS: Is KeystoneJS free?
Yes, KeystoneJS is free and open source with no licensing fees. Core platform has no lock-in and is contributed to by 250+ developers.
SourceMkDocs: Is MkDocs free?
Yes, open source under the BSD licence. The Material theme has a free version and a paid Insiders edition.
KeystoneJS: What are hosting costs for KeystoneJS?
KeystoneJS is self-hosted and deployment-agnostic. Hosting costs depend on your chosen deployment platform (Vercel, AWS, Heroku, etc.) and infrastructure, not KeystoneJS itself.
SourceMkDocs: MkDocs or Docusaurus?
MkDocs is simpler and faster to adopt, especially for Python teams. Docusaurus offers versioning, internationalisation and React components, which matter once documentation grows.
KeystoneJS: Does KeystoneJS offer paid support?
Enterprise support with tailored options is available from Thinkmill, the company behind KeystoneJS. Pricing details available upon request.
SourceMkDocs: Does MkDocs support versioned docs?
Not natively. Plugins such as mike add it, where Docusaurus includes versioning in core.
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- MkDocs vs Sphinx
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- MkDocs vs Antora
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- MkDocs vs GitBook
- MkDocs vs Outline
- MkDocs vs Doxygen
- MkDocs vs Fumadocs
- MkDocs vs Guidde
- MkDocs vs Adobe FrameMaker
- MkDocs vs Archbee