The modern Read the Docs alternative
for API docs built for developers and AI

Best Read the Docs alternative for API docs. Import your OpenAPI spec and publish interactive docs, always in sync and ready for AI.

API referenceInteractive docs from your OpenAPI spec, with Try it and code in 9 languages.Learn moreExplore API reference
API referenceInteractive docs from your OpenAPI spec, with Try it and code in 9 languages.Learn moreExplore API reference
For developers

An API reference developers enjoy

  1. Instant answers right in the search bar to help developers find what they need - fast.

  2. Put quickstarts and how-to guides in the same sidebar as your API reference.

  3. Test every endpoint right from the docs and copy ready-to-use code in 9 languages.

  4. Fibi answers developer questions across your support channels, alongside the rest of your support.

ā€œThe built-in AI answers and support for multiple languages in a single docs site is very helpful. The interface feels intuitive and is easy-to-use.ā€
Mustafa KurtHead of Product, Booking Experts
For AI

Optimized for LLMs out of the box

  1. Every guide and endpoint is listed in your llms.txt, so AI tools find their way.

  2. Write and update your API docs from Claude, ChatGPT, or Cursor through our MCP.

  3. Copy any page as Markdown, or open it in ChatGPT or Claude in one click.

  4. Built to be found and cited by ChatGPT, Claude and other LLMs, with nothing to set up.

Editing

Effortlessly up to date

  1. Run your API docs, versions and settings from one clean dashboard.

  2. Add endpoints, parameters and request examples to any guide.

  3. AI finds missing and outdated answers and updates your guides automatically.

  4. Link your spec or push it from CI. Review the changes, then publish.

ā€œFeaturebase is an impressive way to document software and keep customers engaged. An amazing product from an awesome team.ā€
Michelle RatcliffeUX Docs Writer, The Despatch Company

Migrate your docs from Read the Docs
without starting over.

Import your OpenAPI spec, and bring your guides from Read the Docs through our API.

Read the Docs
  • OpenAPI
  • API

Built for support at scale. Ready for your next stage of growth.

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Read customer stories
@levelsio
ā€œMy entire support documentation and FAQ for Photo AI is now all on @FeaturebaseHQ. (I’m unaffiliated to Featurebase, I just like the product).ā€
Pieter LevelsFounder
ā€œFeaturebase has the perfect mix of features. Branding, custom domain, and integrations took minutes. Exactly what I was looking for.ā€
Scott SagerFounder

Simple, transparent pricing.No sales calls. Start today.

See pricing

Free

For individuals to get started

$0forever

Get started for free

Includes

  • API reference from OpenAPI
  • Unlimited readers
  • Interactive API playground
  • Code samples in 9 languages
  • Import from file, URL & CI
  • 2 live versions per API

Professional

For scaling & multi-team orgs

$59per seat
/ month

Billed yearly

Get started for free

Everything in Growth, plus

  • Private & segmented guides
  • Login-protected docs
  • AI translations (70+ languages)
  • Single Sign-On (SSO)
  • White-label add-on
  • 20 free Lite seats

API docs are part of one Featurebase subscription, with your help center, support inbox, and more. 10-day free trial, no credit card required.

FAQs about Read the Docs vs Featurebase

What is the best Read the Docs alternative?

Featurebase is the modern Read the Docs alternative: interactive API docs from your OpenAPI file, kept in sync from a URL or your CI, with Try it, code samples and docs that ChatGPT and Claude can read. Your guides and Help Center live in the same site.

Is there a free Read the Docs alternative?

Yes. API docs are on every plan, Free included, with Try it. See pricing.

Can I switch from Read the Docs to Featurebase?

Export your OpenAPI spec from ReadMe, Mintlify, Swagger or any other tool and import it. Bring your guides from Intercom, Zendesk, Freshdesk or Crisp with one-click migration.

Can I try Featurebase next to Read the Docs?

Yes. API docs are on the Free plan: import your OpenAPI file, check the reference and Try it, and move your domain when you are ready.

How is Featurebase different from Read the Docs?

Featurebase puts your API reference, your guides and your Help Center in one site, and Fibi, our AI agent, answers developer questions in your chat from the same docs. Your support inbox and feedback boards are in the same product.

Can I create the docs from my OpenAPI file?

Yes. Import an OpenAPI 3.0 or 3.1 spec as a JSON or YAML file, from a public URL, or with a push from your CI. Every endpoint gets its own page, grouped by tag. Convert Swagger 2.0 files to OpenAPI 3 first.

How do the docs stay in sync with my API?

Link a URL that we check every 6 hours, or push the spec from your CI after each deploy, for example with GitHub Actions. Changes wait as a draft that lists what changed and marks breaking changes, until you publish them. You can also roll back to one of the last revisions.

Can developers test endpoints in the docs?

Yes. Try it sends real requests to the servers you allow, with the reader’s own key. You can also show code samples only, or turn Try it off. The Free plan includes 500 Try it requests a day.

Can I combine API docs with guides?

Yes. Your API reference is a tab of your help center, with your guides in its sidebar. One search finds both, and Ask AI and Fibi answer from both.

Can AI tools like ChatGPT and Claude read our docs?

Yes. Every page has a Markdown version and opens in ChatGPT or Claude from its menu, and your guides and endpoints are listed in your llms.txt. Ask AI and Fibi answer from your API reference on the Growth plan and up.

Best Read the Docs alternative for AI-native API docs.

Join 1600+ modern software companies on Featurebase. Import your OpenAPI spec and go live in minutes.