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Documentation · head to head

MkDocs vs Outline

MkDocs logo

MkDocs

Documentation

Static site generator for project documentation in Markdown

From
Free
Rated
-
Full reviewWebsite
Outline logo

Outline

Documentation

Team knowledge base under the Business Source Licence, self-hostable or vendor hosted

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: MkDocs no built-in versioning, which Docusaurus provides and documentation teams eventually need; Outline the Business Source Licence is not an open source licence, so anyone planning to host Outline for clients, resell it or embed it in a commercial service is prohibited until the per-release change date passes, and this is regularly discovered only at legal review.
  • They diverge on capability: MkDocs covers Plain Markdown, Outline covers Structured collections.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which MkDocs and Outline actually diverge.

Attributes where MkDocs and Outline differ
AttributeMkDocsOutline
Pricing modelOpen source, no licence feeFree to self-host, per user per month when hosted by the vendor
PlatformsWeb, Linux, macOS, WindowsWeb, Self-hosted, Docker, iOS, Android

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Documentation).

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 MkDocs

  • Plain Markdown
  • Single YAML config
  • Material theme
  • Live preview

Only in Outline

  • Structured collections
  • Block editor
  • Search
  • Backlinks and mentions
  • Templates
  • API and webhooks
  • Single sign-on
  • Self-hosting

What people use each for

The jobs each tool is most often brought in to do.

MkDocs

  • Project documentation for teams that would rather not run a JavaScript toolchainnot Outline
  • Python projects keeping docs beside the codenot Outline
  • Documentation that must build fast in CI on every commitnot Outline

Outline

  • Running an internal wiki on your own infrastructure when documentation cannot leave a specific jurisdictionnot MkDocs
  • Replacing a general-purpose workspace tool with something narrower where search speed and writing flow matter mostnot MkDocs
  • Keeping engineering decision records and postmortems in templated documents that link to each other automaticallynot MkDocs
  • Giving a company already standardised on Google or Okta a wiki that inherits identity and group membership directlynot MkDocs

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

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

Outline

  • The Business Source Licence is not an open source licence, so anyone planning to host Outline for clients, resell it or embed it in a commercial service is prohibited until the per-release change date passes, and this is regularly discovered only at legal review.
  • There is no local password authentication, so self-hosting requires an identity provider to be in place first, which turns a small internal wiki into a project with a dependency on Google, Okta, Entra or a Keycloak instance somebody has to run.
  • Self-hosting needs Postgres, Redis and S3-compatible object storage together, so the operational footprint is larger than the single database most internal wikis require.
  • The hosted plans offer no customer-selectable hosting region, so buyers with data residency obligations are pushed to self-hosting even when they would have paid to avoid running servers.
  • It is built for internal knowledge rather than public documentation, with no versioned documentation sets, no static output and limited public publishing, so it will not serve as a product documentation site.
  • Because it is a single-vendor project rather than a foundation-governed one, a future licence or pricing change applies to new releases and the only defence is staying on an older version.

Pricing, plan by plan

MkDocs

Free
  • MkDocsFree
    • Full functionality
    • Commercial use permitted
    • Community support

Outline

Free
  • Self-hostedFree
    • Source available under the Business Source Licence
    • No licence fee for use inside your own organisation
    • Requires Postgres, Redis and S3-compatible storage
  • Team (hosted)$undefined/month
    • Charged per user per month
    • Hosted and maintained by the vendor
    • Single sign-on through Google, Slack or Microsoft
  • Enterprise (hosted)$undefined/month
    • SAML single sign-on and provisioning
    • Administrative controls and audit visibility
    • Negotiated terms and support

Which should you pick?

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.
MkDocs review

Choose Outline if

  • You need structured collections.
  • You want to start without paying.
  • You work on Web, Self-hosted, Docker, iOS, Android.
  • You also want block editor.
Outline review

Questions people ask

Is MkDocs or Outline better?
Neither clearly leads. MkDocs starts at Free and Outline at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, MkDocs or Outline?
MkDocs starts at Free and Outline at Free.
Does MkDocs or Outline run on more platforms?
MkDocs runs on Web, Linux, macOS, Windows. Outline runs on Web, Self-hosted, Docker, iOS, Android.
Can I use MkDocs for free?
Both have a free tier, so you can try either at no cost before committing.
What is MkDocs best used for?
MkDocs is most often used for project documentation for teams that would rather not run a javascript toolchain, python projects keeping docs beside the code, documentation that must build fast in ci on every commit. Of those, project documentation for teams that would rather not run a javascript toolchain and python projects keeping docs beside the code are not what Outline is typically brought in for.
What can MkDocs do that Outline cannot?
MkDocs covers Plain Markdown, Single YAML config, Material theme, Live preview. Outline covers Structured collections, Block editor, Search, Backlinks and mentions.

Answered from the vendors’ own pages

MkDocs: Is MkDocs free?

Yes, open source under the BSD licence. The Material theme has a free version and a paid Insiders edition.

Outline: Is Outline open source?

No, not in the OSI sense. It is source available under the Business Source Licence, which permits internal use and self-hosting but not offering it as a service to others, with each release converting to an open source licence after its change date.

MkDocs: 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.

Outline: Can I run it for free?

Yes, for your own organisation. Self-hosting carries no licence fee, only the cost of running Postgres, Redis, object storage and an identity provider.

MkDocs: Does MkDocs support versioned docs?

Not natively. Plugins such as mike add it, where Docusaurus includes versioning in core.

Outline: Can I choose where the hosted version stores data?

No. The hosted plans do not offer a region choice, so residency requirements mean self-hosting.

Outline: Does it work for public product documentation?

Poorly. It has no versioned documentation sets or static site output, so it is best kept for internal knowledge.

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