GitBook alternatives, open source and paid, in 2026

The GitBook alternatives worth a look in 2026 are Mintlify, ReadMe and Archbee if you want someone else to host your docs, and Docusaurus and mdBook if you’d rather run a free, open source site yourself. GitBook’s free plan is for one person, with no custom domain. Its first paid plan, Essential, is $65 a site a month billed yearly, plus $12 for every user, and AI answers for your readers start there. We read every price on this page on the vendor’s own site on 21 October 2026, in US dollars, and each one links to where we read it.

We make Deacon, which doesn’t host docs at all. It’s an AI support agent that answers your visitors from the docs you already have, wherever they live, and shows you what those visitors are stuck on and asking for. It has a free plan.

Why teams start looking past GitBook

The reasons are usually in GitBook’s own pages. Read them before you move, because some of them may not apply to you.

• The bill grows with your team. Every paid plan is priced per site, and every person who can log in to edit is $12 a month on top. Readers are free, and page views are unlimited on every plan.
• The free plan is a personal one. It has one user and no custom domain, so a team’s public docs need Essential at least.
• The AI you’d want on a docs site sits on Ultimate. Essential gives readers short answers from the search box. The chat sidebar, the embed for your own site or product, AI insights and the Content gaps report are all on Ultimate, at $249 a site a month billed yearly.
• You can’t paste in code of your own. GitBook’s site customization guide says custom CSS, HTML or JavaScript can’t be inserted directly into a GitBook site, and points to its integrations and embeds instead. Those cover popular tools, such as the Intercom and Crisp chat widgets. The same guide says the small “Powered by GitBook” link can’t be removed, whatever the plan.
• The open source tool is retired. GitBook’s own repository says its previous version and its CLI tool are deprecated, so a project that once built its book locally with GitBook needs something else to do that now.

GitBook and five alternatives at a glance

GitBook is the first row. The AI column is about answering the people who read your docs, not about AI that helps you write them.

What GitBook costs, AI credits included

GitBook’s pricing page quotes yearly billing, which it says gives two months free. A plan is bought for each site, and users are added to the organisation.

• Free, $0, for one user. It has the block editor, two-way Git Sync with GitHub or GitLab, generated API docs, preview deployments, an MCP server for your docs and GitBook Agent for 10 messages a week.
• Essential, $65 a site a month, plus $12 a user. It adds a custom domain, your team, real-time editing, reviews, redirects, search analytics and AI Assistant Ask, which answers questions from the search box.
• Ultimate, $249 a site a month, plus $12 a user. It adds Assistant Chat, a chat sidebar on your docs, and the embed that puts the Assistant on your own website or product. It also adds AI insights into how the Assistant answered, the Content gaps report, sources such as GitHub and Slack, authenticated access and a custom subdirectory.
• Enterprise is priced by quote, with SAML SSO, migration help and invoicing.

GitBook’s pricing calculator puts one Ultimate site with one user at $261 a month. The $12 is charged for every user, the first included.

The AI is billed in credits that every site shares. Essential includes $20 of credits a month, which is 2,000, and Ultimate includes $100, which is 10,000. A relevant question answered by Ask or Chat takes 20 credits, and translating 1,000 words takes 30. GitBook’s FAQ says use past your credits is billed at $0.01 a credit on your next invoice, and that you can switch on an auto pause instead. Monthly bundles cost less per credit, from 5,000 credits for $47.50 to 40,000 for $300.

By our sums, Essential’s credits cover 100 questions a month and Ultimate’s cover 500, and each question past that costs $0.20. A team of five on Essential pays $125 a month billed yearly, before any extra credits.

There’s a 14-day trial of every feature, which starts when you invite someone, publish a site or switch on a paid feature. Open source projects and education can apply for the free Community plan. GitBook offers startups no discount beyond paying yearly, and it gives no refunds.

Five alternatives, each set against GitBook

Each of these replaces GitBook as the place your docs live. GitBook charges for each person who edits, and these differ most in how they charge instead, by the team, by an add-on, or not at all.

Mintlify

Mintlify charges a flat price where GitBook charges per person. Its Starter plan is free forever, with 5 editor seats, hosting, a custom domain, the web editor and an MCP server, so a small team gets a custom domain without paying, which GitBook’s free plan doesn’t offer. Pro is $450 a month billed yearly, or $540 monthly, with unlimited editor seats, the assistant, a writing agent, automations and preview deployments.

By our sum, GitBook’s Ultimate passes Mintlify’s Pro at 17 users, when $249 plus 17 seats at $12 comes to $453 a month. Below that, GitBook costs less, and Essential costs much less if Ask from the search box is all the AI you need.

Mintlify’s assistant takes 25 credits an answer from Pro’s 10,000 a month, and costs nothing when it can’t answer, so a month’s credits cover 400 answers by our sum. Extra credits are $0.01 each, and you can turn overages off. Pages are Markdown files in a Git repository on every plan. Mintlify’s own migration packages cover ReadMe and Docusaurus, and for any other platform it asks you to get in touch. Venture-backed startups under 2 years old that have raised under $2M can get 50% off Pro for 12 months. Pick Mintlify when more than about 17 people edit your docs and you want a chat assistant for readers. Mintlify alternatives goes the other way, starting from Mintlify.

ReadMe

ReadMe puts the API reference first, where GitBook starts from written guides. Its Starter plan is free for everyone and includes a custom domain, bi-directional sync, an interactive API reference, usage metrics and an MCP server. Pro is $250 a month billed yearly and adds teammates, multiplayer editing, branching and reviews, private docs, a changelog, recipes and forums. It includes 5 admins, and each extra admin is $20.

The AI is sold differently from GitBook’s. Pro comes with Ask AI Lite. The full Ask AI is a $150 a month add-on on any plan, Starter included, so a free ReadMe site can answer readers with AI for $150 a month. Pick ReadMe when most of your readers are developers calling your API.

Archbee

Archbee is a hosted docs platform close to GitBook in what it does, with two differences that matter to a product team. It allows custom JavaScript from its first plan, and it has an App Widget that puts your docs inside your own product. It has no free plan, only a 14-day trial. Growing starts at $80 a month on yearly billing, with unlimited readers, unlimited spaces, a custom domain, password protection, GitHub integration and API docs. Scaling starts at $350 a month and adds versioning, localisation, reviews and finer access control. Readers are free, and you pay for extra team members.

AI is an add-on. Its tokens pay for question answering and for writing features, with 20 million tokens a month on Growing and 40 million on Scaling, and extra tokens at $1.20 a million. We couldn’t find the add-on’s own price in the pricing page’s text. Open source projects get Growing free, and early-stage startups can get 50% off any plan for 2 years. Pick Archbee when you want a script of your own on the docs, or the docs themselves inside your product.

Docusaurus

Docusaurus swaps GitBook’s editor for files you own. It’s a static site generator built on React, made for documentation. You write Markdown or MDX, build the site and publish it to GitHub Pages, Netlify, Vercel or another host. The software is free, and the work of building, styling and updating the site is yours.

Docusaurus’s search guide puts Algolia DocSearch first, as the option it supports officially, ahead of community ones such as Typesense DocSearch and local search. It says DocSearch is free for developer documentation and technical blogs once your application to the DocSearch program is accepted, and that its Ask AI is “available at no additional cost”, with only your model provider’s usage to pay. So the AI answers cost what the model costs, if you have the developer time to set them up. Pick Docusaurus when someone on your team knows React and would rather own the site than rent it. Adding an AI chatbot to a GitHub Pages site shows where a script tag goes on one built there.

mdBook

mdBook is the nearest thing to the GitBook that used to be open source. Its GitHub page describes it as “Like Gitbook but implemented in Rust”, and the Rust project publishes its own books with it. It’s a command line tool that turns a folder of Markdown files into a book, with search built in, syntax highlighting, themes, and plugins for extra syntax or other output formats. You download one program for Windows, macOS or Linux, or install it with Cargo, and host the HTML it builds anywhere.

Its feature list names no AI assistant. It does let you load your own JavaScript files through the additional-js setting in book.toml, so a short file can add whichever chat script you like. Pick mdBook for a tutorial, a course or an open source project’s guide that reads front to back.

Keep GitBook for the docs and put Deacon in your product

Moving docs is a big job, and the reason behind it is often the AI. If what you want is answers for your customers and a clear view of what they ask, you can leave your docs on GitBook, or on any tool above, and add Deacon to the pages your customers actually use.

Deacon is a script tag you paste in yourself, so it goes on your marketing site and inside your app rather than on the GitBook site, and answers there from your GitBook pages. It reads them like any other website. When you sign up, it reads your home page and the main pages it links to, and a help centre on its own subdomain, such as docs.example.com, can be one of them. The free plan fetches 10 pages a month, that first read included, and you can add other docs pages one at a time by their links. A paid plan has the pages to crawl the whole docs site.

GitBook keeps AI insights and its Content gaps report for Ultimate. Deacon’s own view of what customers ask is on every plan, the free one included, and it reaches past the docs to the product.

Feature asks and bug reports, kept apart from docs gaps

A customer who types “can you add a Zapier trigger?” isn’t short of a GitBook page. They want something your product doesn’t do yet. GitBook’s Content gaps ranks the questions your docs don’t answer and fills them with GitBook Agent, which suits a missing page. Deacon keeps the asks for something new on a list of their own, What they ask you to build on Analytics › Widget, each in the customer’s words and a click from its conversation. In What people ask, each of your Topics shows its type, a typical question, how many Deacon answered and the source it answered from most, so you can see which GitBook page is carrying it. A topic you mark done comes back by itself once more people ask. Bug reports go to Problems in your product, beside the JavaScript errors on your own pages, and each one copies for a coding agent such as Claude Code or Cursor.

Questions asked from inside your app

A reader who gives up on your GitBook docs usually asks again where they’re working, in your app. Deacon is on those screens, and each conversation keeps the page the customer was on, so a question about webhooks asked from your integrations settings shows that page in the dashboard. Analytics › Website turns it into numbers. Beside the visits to each of your most visited pages, it counts the questions asked there and the ones Deacon couldn’t answer, so the screen that sends people to the chat stands out.

Fixes that skip the change request

What needs you begins with one Start here sentence naming the first job, such as people waiting for a reply, and the questions your GitBook pages left open follow under What Deacon didn’t know. In GitBook, a fix is a change request, a branch you merge, with a review if you ask for one. In Deacon, you write the fix the way you’d reply, or as rough notes, and press Save. Deacon decides which section of its help document the fix belongs in, or whether it’s for your Instructions, and shows where it went, with Move and Undo. Deacon then asks itself the customer’s question again, and you read its new reply under “Deacon now says”.

Install steps for sites from AI app builders

If your marketing site or app came out of Lovable, Bolt, Replit or Base44, and your home page shows which, Install opens on that builder’s own steps, with a short prompt to paste into its chat. When nothing on the page shows how the site was made, Install offers one prompt that any AI tool can follow to add the tag.

The knowledge base chatbot page walks through how Deacon reads and answers from your docs.

Which GitBook alternative to choose

Start with who edits your docs, then with what you’d pay before readers get AI answers.

If writers outside engineering edit alongside developers and your team is small, GitBook’s Essential costs $125 a month for five people, with AI answers from the search box, and staying may be the cheaper move. If more than about 17 people edit and you want a chat assistant, Mintlify’s flat Pro price comes out lower by our sum. If your readers are developers calling an API, ReadMe’s free Starter with the Ask AI add-on gives AI answers on a custom domain for $150 a month. If you need your own scripts or docs inside your app, Archbee allows both. If you have a developer and want to pay nothing, Docusaurus gives you AI answers through Algolia, and mdBook gives you the simplest book from Markdown.

If you answer support yourself, the docs platform matters less than where your customers ask. How to set up an AI chatbot for documentation walks through choosing the pages, testing on real questions and keeping it current.

Questions about GitBook alternatives

What’s the best free GitBook alternative?

For a team, Mintlify’s Starter, which is free with 5 editors and a custom domain, though without AI. For a developer who’ll host it, Docusaurus, which adds AI answers through Algolia’s DocSearch. For an open source book, mdBook. ReadMe’s Starter is free with a custom domain too.

GitBook vs Mintlify: which costs less?

GitBook, for most small teams. Essential with five users is $125 a month billed yearly, against Mintlify Pro’s $450. Mintlify’s Starter is free for 5 editors with a custom domain, which GitBook’s free plan doesn’t offer, but neither free plan answers readers with AI. On our sums, GitBook’s Ultimate costs more than Mintlify’s Pro from 17 users.

Can I add a chat widget to a GitBook site?

Yes, through GitBook’s integrations. Its Intercom and Crisp integrations add those chat widgets to your published docs. What you can’t do is paste in a script of your own, because GitBook says custom code can’t be inserted directly into a site. So Deacon goes on your own site and app, and answers there from your GitBook pages.

How do I move my docs off GitBook?

Git Sync, on every GitBook plan, keeps your content in a GitHub or GitLab repository, so that repository is your copy wherever you go. Every published GitBook site also has a Markdown version of each page. Mintlify’s automated migration covers ReadMe and Docusaurus, so from GitBook you’d bring the files across yourself or ask Mintlify for help.

Can Deacon answer from GitBook docs behind a login?

GitBook’s authenticated access, on Ultimate, keeps a docs site to the readers you allow. For docs like that, give Deacon the content as files instead. It takes PDF, Word, Markdown, text, CSV and HTML files of up to 10 MB each, or pasted text, and an answer from a file or pasted text carries no link back to a page.