Documentation · head to head
Read the Docs vs Redocly
Read the Docs
Documentation
Documentation hosting with versioning built for open source
- From
- Free
- Rated
- -
Redocly
Documentation
API documentation and OpenAPI governance platform
- From
- On request
- Rated
- -
The short version
- Only Read the Docs has a free tier, so it costs nothing to try first.
- Each has a real cost: Read the Docs build configuration is finicky, and build failures on dependency changes are a common frustration; Redocly only as useful as your commitment to OpenAPI; teams without a maintained spec get little from it
- They diverge on capability: Read the Docs covers Build on commit, Redocly covers OpenAPI reference docs.
Where they differ
Only the attributes on which Read the Docs and Redocly actually diverge.
| Attribute | Read the Docs | Redocly |
|---|---|---|
| Starting price | Free | On request |
| Pricing model | Free for open source; paid business plans for private documentation | Free open-source CLI and Redoc renderer; paid plans for the portal, published on the vendor site |
| Free tier | Yes | No |
| Platforms | Web, Cloud | Web, Cloud, Self-hosted |
Identical on both: 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 Read the Docs
- Build on commit
- Version by branch and tag
- Pull request previews
- Free for open source
Only in Redocly
- OpenAPI reference docs
- Spec linting
- Developer portal
- Versioning
- Try it
- Git workflow
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 Redocly
- Teams wanting docs rebuilt automatically on every commitnot Redocly
- Reviewing documentation changes in a pull request before mergenot Redocly
Redocly
- API teams whose reference docs are thin because the spec is thinnot Read the Docs
- Organisations enforcing API style rules across many teamsnot Read the Docs
- Developer portals combining guides with generated referencenot 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
Redocly
- Only as useful as your commitment to OpenAPI; teams without a maintained spec get little from it
- The portal and governance features are paid, while the open-source renderer covers only reference rendering
- Linting rules are another thing to configure and argue about before value appears
- Narrower than a general documentation platform, by design
Pricing, plan by plan
Read the Docs
Free- FreeFree
- Core functionality
- Public projects
Redocly
On requestNo published plan breakdown. See the Redocly review.
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.
Choose Redocly if
- You need openapi reference docs.
- You work on Web, Cloud, Self-hosted.
- You also want spec linting.
Questions people ask
- Is Read the Docs or Redocly better?
- Neither clearly leads. Read the Docs starts at Free and Redocly at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Read the Docs or Redocly?
- Read the Docs has a free tier; the other does not. Paid plans start at Free for Read the Docs and On request for Redocly.
- Does Read the Docs or Redocly run on more platforms?
- Read the Docs runs on Web, Cloud. Redocly runs on Web, Cloud, Self-hosted.
- Can I use Read the Docs for free?
- Yes. Read the Docs has a free tier, so you can try it without paying. Redocly starts at On request.
- 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 Redocly is typically brought in for.
- What can Read the Docs do that Redocly cannot?
- Read the Docs covers Build on commit, Version by branch and tag, Pull request previews, Free for open source. Redocly covers OpenAPI reference docs, Spec linting, Developer portal, Versioning.
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.
Redocly: Is Redocly free?
The Redoc renderer and CLI are open source and free. The developer portal and governance features are paid, with pricing published on the vendor site.
Read the Docs: What does it build from?
Most commonly Sphinx or MkDocs sources kept in your repository.
Redocly: What does the linter do?
It enforces rules on the OpenAPI spec itself in CI — missing descriptions, naming, examples — so a poor spec fails the build rather than becoming poor documentation.
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.
Redocly: Do I need OpenAPI to use it?
Effectively yes. Without a maintained specification there is little for it to work with.