Collection №21 — Updated 9 August 2026
The 5 best documentation tools in 2026
Documentation tools split on who writes the pages. Mintlify, Docusaurus and Starlight keep docs as markdown in the repo, so updates ship through the same pull requests as the code they describe. GitBook moves editing into the browser for teammates who will never touch Git. ReadMe is for a different job: an interactive API reference, generated from your OpenAPI spec.
| Tool | Type | Cost | Verdict |
|---|---|---|---|
| Docs platform | Free | ★ Best overall | |
| Docs workspace | Free | Best for non-engineers | |
| API reference platform | Free | Best for API references | |
| Static site generator | Free | Best for versioned docs | |
| Astro docs theme | Free | Best lightweight option |
Mintlify
★ Best overallHosted docs that publish from markdown files in your repo
Docs live as markdown files in your repo and publish when you merge, so they go through the same review as the code. The default themes look designed without a designer, and it renders an interactive API playground from an OpenAPI spec. A lot of recent startup docs run on it.
Visit MintlifyGitBook
Best for non-engineersBrowser-based docs editing for teams where not everyone codes
The editor runs in the browser and works like a modern wiki, so support and product teammates can fix a page without a pull request. Git sync keeps a copy in the repo for engineers who want one. Pick it when engineers are not the only people writing docs.
Visit GitBookReadMe
Best for API referencesTurns an OpenAPI spec into an interactive API reference
Upload an OpenAPI spec and it renders a reference where developers call your API from the page with their own keys. It also shows which endpoints get used and where calls fail, so you learn what confuses people. If your product is an API, start here.
Visit ReadMeDocusaurus
Best for versioned docsMeta's React docs generator, with versioning and translations built in
An open-source site generator from Meta, so you own the build and the hosting. Versioned docs and translations are built in, which matters once you support more than one release of your product. It takes an engineer to set up, and that engineer keeps owning it.
Visit DocusaurusStarlight
Best lightweight optionFast static docs from Astro, with barely any JavaScript
An open-source documentation theme for the Astro framework. Pages ship with almost no JavaScript, so they load fast without tuning. Search and dark mode are built in, and plain markdown is enough to get pages up. If Docusaurus feels heavier than the job needs, use this instead.
Visit StarlightFrequently asked questions
What is the best free documentation tool?
Docusaurus and Starlight are free without limits: both are open-source generators, and the static sites they produce cost nothing to host on platforms like Netlify or GitHub Pages. Mintlify and GitBook have free tiers that cover a small public docs site. ReadMe's free plan is enough to publish a basic API reference.
What is the best tool for API documentation?
ReadMe is built for the job: it turns an OpenAPI spec into an interactive reference where developers make live calls with their own keys, and it reports which endpoints get used. Mintlify also renders an API playground from an OpenAPI spec, inside a broader docs site. Pick ReadMe when the API is most of what you sell, and Mintlify when the reference sits alongside guides.
Should I use Docusaurus or a hosted docs platform?
Docusaurus gives you a site you build and host yourself, so nothing depends on a vendor, but an engineer has to own it. Hosted platforms like Mintlify and GitBook handle search, themes and publishing for you. Most small teams keep docs fresher on a hosted platform; choose Docusaurus when you need custom behaviour or docs versioned across releases.