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Head-to-head · Api Docs

Fern vs Dokka

  • Updated Oct 2026
  • Both researched from official sources
  • 2 checks side by side
Higher score Fern #6 in Api Docs 8.5/10 Free plan Free plan✓ 1 of 6 features Visit Fern
Dokka #8 in Api Docs 8.2/10 Open source ✓ 0 of 6 features Visit Dokka

Fern leads on 0 checks, Dokka on 0, and 2 are even. Who comes out ahead on the 2 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreFern · 8.5/10
  • Free planonly Fern
  • Most featuresFern · 1 of 6

Fern scores higher on our rubric for api docs: 8.5 against 8.2 out of 10; our editors rank them #6 and #8.

Fern is the better fit for teams wanting free API docs with self-hosting options. Dokka is the better fit for kotlin and Java teams generating source API docs.

  • Fern fits best

    Teams wanting free API docs with self-hosting options

  • Dokka fits best

    Kotlin and Java teams generating source API docs

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Side by side

Feature Fern 8.5/10 Visit ↗ Dokka 8.2/10 Visit ↗
At a glance
Editor score 8.5 8.2
Ranking #6 in Api Docs #8 in Api Docs
Best for Teams wanting free API docs with self-hosting options Kotlin and Java teams generating source API docs
Pricing model Free plan + paid Free
Starting price — Open source
Free plan ✓ (best) Not checked yet
Free trial — —
Support Email, Docs Community, Docs
Integrations 5 integrations 3 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features Fern 1/6 · Dokka 0/6
OpenAPI import Not checked yet Not checked yet
Custom domain ✓ (best) Not checked yet
Docs as code Not checked yet Not checked yet
Interactive API explorer Not checked yet Not checked yet
Documentation versioning Not checked yet Not checked yet
Documentation analytics Not checked yet Not checked yet
Our review
Pros
  • Generates API references from OpenAPI and other specifications
  • Supports cloud and self-hosted deployment options
  • Combines versioned docs, custom domains, and AI-powered search
  • Generates docs from Kotlin KDoc and Java Javadoc in mixed projects
  • Offers HTML, Javadoc HTML, and two Markdown output formats
  • Runs with Gradle, Maven, or the command line, with versioning plugins
Cons
  • Free plan is limited to 10 team members and 1,000 pages.
  • Free plan caps AI credits at 250 and page generations at 2,000 monthly.
  • Enterprise pricing is custom, with advanced controls reserved for that tier.
  • Language support is limited to Kotlin and Java
  • Does not document OpenAPI-based services
  • Support channels are community and documentation
Our verdict

Fern is a documentation platform for developer-facing teams that publish API references and guides. Markdown authoring, API-spec generation, changelogs, search, an API explorer, and a visual editor support both technical writers and…

Read the review →

Dokka generates API documentation from Kotlin KDoc comments and Java Javadoc comments, making it a source-based option for developers and library teams working in Kotlin, Java, Android, or multiplatform projects. It can also process…

Read the review →
  1. FernApi Docs 8.5Free plan
  2. DokkaApi Docs 8.2Open source

Strengths and trade-offs

  • Fern — where it wins

    • Generates API references from OpenAPI and other specifications
    • Supports cloud and self-hosted deployment options
    • Combines versioned docs, custom domains, and AI-powered search

    Where it doesn't

    • Free plan is limited to 10 team members and 1,000 pages.
    • Free plan caps AI credits at 250 and page generations at 2,000 monthly.
    • Enterprise pricing is custom, with advanced controls reserved for that tier.

  • Dokka — where it wins

    • Generates docs from Kotlin KDoc and Java Javadoc in mixed projects
    • Offers HTML, Javadoc HTML, and two Markdown output formats
    • Runs with Gradle, Maven, or the command line, with versioning plugins

    Where it doesn't

    • Language support is limited to Kotlin and Java
    • Does not document OpenAPI-based services
    • Support channels are community and documentation
  • Fern8.5/10 · Free plan

    API documentation with exploration, versioning, analytics, and flexible deployment.

    Visit FernFull verdict →
  • Dokka8.2/10 · Open source

    A free, open-source choice for generating versioned API docs from Kotlin and Java source.

    Visit DokkaFull verdict →

More comparisons

All api docs comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update