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Documentation · head to head

Read the Docs vs Spring Cloud Gateway

Read the Docs logo

Read the Docs

Documentation

Documentation hosting with versioning built for open source

From
Free
Rated
-
Full reviewWebsite
Spring Cloud Gateway logo

Spring Cloud Gateway

APIs

API gateway built on Project Reactor for building microservices

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Read the Docs build configuration is finicky, and build failures on dependency changes are a common frustration; Spring Cloud Gateway released under the Apache 2.0 license, free and open source with no commercial tier
  • They diverge on capability: Read the Docs covers Build on commit, Spring Cloud Gateway covers Routing.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Read the Docs and Spring Cloud Gateway actually diverge.

Attributes where Read the Docs and Spring Cloud Gateway differ
AttributeRead the DocsSpring Cloud Gateway
Pricing modelFree for open source; paid business plans for private documentationopen-source
PlatformsWeb, CloudJava, Spring Boot
CategoryDocumentationAPIs
FoundedUnknown1998

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 Read the Docs

  • Build on commit
  • Version by branch and tag
  • Pull request previews
  • Free for open source

Only in Spring Cloud Gateway

  • Routing
  • Path Rewriting
  • Circuit Breaker
  • Spring Boot
  • Spring Security
  • Spring Cloud
  • Java support
  • Spring Boot support

What people use each for

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

Read the Docs

  • Open-source projects needing free hosted versioned documentationnot Spring Cloud Gateway
  • Teams wanting docs rebuilt automatically on every commitnot Spring Cloud Gateway
  • Reviewing documentation changes in a pull request before mergenot Spring Cloud Gateway

Spring Cloud Gateway

  • API Developmentnot Read the Docs
  • API Gatewaynot Read the Docs
  • API Testingnot Read the Docs
  • API Documentationnot Read the Docs
  • Microservicesnot Read the Docs

Where each one falls short

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

Read the Docs

  • Build configuration is finicky, and build failures on dependency changes are a common frustration
  • Default themes are recognisable and dated, so sites look alike unless customised
  • Private documentation requires a paid business plan
  • Build times on large projects are slow enough to interrupt a review cycle

Spring Cloud Gateway

  • Released under the Apache 2.0 license, free and open source with no commercial tier

Pricing, plan by plan

Read the Docs

Free
  • FreeFree
    • Core functionality
    • Public projects

Spring Cloud Gateway

Free
  • Open SourceFree
    • Core Spring Cloud Gateway
    • Community support

Which should you pick?

Choose Read the Docs if

  • You need build on commit.
  • You want to start without paying.
  • You work on Web, Cloud.
  • You also want version by branch and tag.
Read the Docs review

Choose Spring Cloud Gateway if

  • You need routing.
  • You want to start without paying.
  • You work on Java, Spring Boot.
  • You also want path rewriting.
Spring Cloud Gateway review

Questions people ask

Is Read the Docs or Spring Cloud Gateway better?
Neither clearly leads. Read the Docs starts at Free and Spring Cloud Gateway at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Read the Docs or Spring Cloud Gateway?
Read the Docs starts at Free and Spring Cloud Gateway at Free.
Does Read the Docs or Spring Cloud Gateway run on more platforms?
Read the Docs runs on Web, Cloud. Spring Cloud Gateway runs on Java, Spring Boot.
Can I use Read the Docs for free?
Both have a free tier, so you can try either at no cost before committing.
What is Read the Docs best used for?
Read the Docs is most often used for open-source projects needing free hosted versioned documentation, teams wanting docs rebuilt automatically on every commit, reviewing documentation changes in a pull request before merge. Of those, open-source projects needing free hosted versioned documentation and teams wanting docs rebuilt automatically on every commit are not what Spring Cloud Gateway is typically brought in for.
What can Read the Docs do that Spring Cloud Gateway cannot?
Read the Docs covers Build on commit, Version by branch and tag, Pull request previews, Free for open source. Spring Cloud Gateway covers Routing, Path Rewriting, Circuit Breaker, Spring Boot.

Answered from the vendors’ own pages

Read the Docs: Is Read the Docs free?

Free for open-source public projects. Private documentation requires a paid business plan.

Spring Cloud Gateway: Is Spring Cloud Gateway free?

Yes, Spring Cloud Gateway is free and open-source software. It is part of the Spring ecosystem and available through GitHub repositories with open-source dependencies like spring-cloud-starter-gateway-server-webflux and spring-cloud-starter-gateway-server-webmvc.

Source
Read the Docs: What does it build from?

Most commonly Sphinx or MkDocs sources kept in your repository.

Spring Cloud Gateway: What enterprise support is available for Spring Cloud Gateway?

Tanzu Spring provides optional enterprise support including Day 0 access to security patches for organizations requiring guaranteed support, but specific pricing is not published on the Spring Cloud Gateway project page.

Source
Read the Docs: How does versioning work?

It maps branches and tags to documentation versions, so several releases are served side by side without manual work.

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