Every free documentation tier that clears our bar in 2026: 2 offers meet the criteria and 5 offers are demoted with a named reason. Recorded changes and a published ranking method. We could not confirm today's terms for 6 of them: on 5 the page we cite did not answer, and on 1 our own read did not confirm them. Each row says why.
Documentation platform — Free includes 1 free user. AI search, AI writing and editing, and custom domain are not included. GitBook Agent has a 10 message limit per week.
API documentation platform Starter plan — 1 project, 1 API reference, 1 published version, 1 admin seat, 24-hour request log retention, AI Dropdown / LLMs.txt / MCP Server included (Ask AI is a $150/mo add-on), ReadMe branding (cannot remove). Includes a custom domain; no custom CSS/HTML/JS
Free OSS (BSD). Python documentation generator. Extensive cross-referencing, automatic indices, code documentation from docstrings. Powers Python official docs and Read the Docs. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-09, so we cannot confirm these terms today.
Free for three users with 50 MB storage, unlimited pages, zip backups, RSS & Atom feed, access controls & customizable CSS. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-10, so we cannot confirm these terms today.
Free OSS (MIT). Next.js-based documentation framework with MDX, full-text search, syntax highlighting, and dark mode. Simple file-system routing. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-09, so we cannot confirm these terms today.
Free OSS (MIT). Vite and Vue-powered static site generator for documentation. Fast dev server, lightweight output, built-in search. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-09, so we cannot confirm these terms today.
Free OSS (MIT). Meta-backed React/MDX documentation framework. Built-in search, versioning, i18n, and plugin system. The page we cite for this offer states no amount, tier or rate we can read when we last looked, on 2026-10-09, so we cannot confirm these terms today.
| Vendor | Free Tier | Key Limits | Durability | Read / catalogue date |
|---|---|---|---|---|
| GitBook | Free | Documentation platform — Free includes 1 free user. AI search, AI writing and editing, and custom domain are not include... | — | 2026-11-09 |
| ReadMe | Free | API documentation platform Starter plan — 1 project, 1 API reference, 1 published version, 1 admin seat, 24-hour request... read found the page different · 2026-11-05 |
stable | 2026-11-05 / 2026-10-09 |
We publish no ranking of these. Nothing we record measures popularity or generosity, so naming a best or a top few would be our preference rather than our data. We hold 2 free documentation offers that clear our bar, each listed with the terms we publish and the date we last read them. Our ranking rule is published at /criteria.
2 offers meet our criteria for this category. Of those, 1 carries no recorded change to the terms we publish, and we publish no durability signal for 1. The Durability column below says which offer is in which group, and links the dated record behind every change. We withhold the class where the pricing page does not resolve or states no amount, tier or rate we can read, where we refused the last read, where the listing is gated, or where a narrowing in our records cites no source or no archived copy of the vendor's page has confirmed it. We do not rank these by how much you get, because the limits are not comparable without reading each vendor's page.