6 free alternatives to GitBook

Read the Docs gives free open-source project hosting with public documentation hosting, ads-supported hosting, and the ability to clone public repositories. Its free tier is built around published docs from Git repositories, so it suits projects that want docs generated from source on commit. The free offer is perpetual for open-source projects, which makes it attractive when you need ongoing hosting rather than a trial. It also avoids GitBook's single-user collaboration ceiling because the main limiter is project type, not a one-person quota. What it does not try to be is a block editor or a collaborative knowledge base for private internal docs.

• Beats GitBook: Free forever for open-source public docs
• Falls short: No block-based editor or broad collaboration features
• Who should switch: Switch to this if your docs are open source and you want hosted, Git-backed publishing without a per-user free cap.

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ReadMe's free tier includes one project, one published version, documentation metrics, API access, bidirectional sync, custom MDX components, branches, reusable content, PDF export, a theme editor, a custom domain, AI dropdown, LLMs.txt, and the MCP server. It is a stronger fit for API-first documentation than GitBook because it centers on interactive API docs and developer-facing workflows. The free plan also gives you one admin and 24 hours of request history and detailed logs, so it is more of a structured starter workspace than a broad team plan. Its biggest advantage is deeper API-doc tooling, while the tradeoff is tighter project and version limits.

• Beats GitBook: Stronger API documentation workflow
• Falls short: Only one project and one published version
• Who should switch: Switch to this if your docs are API-centric and you want interactive, developer-facing features more than general knowledge-base editing.

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GitHub Pages is an always-free static hosting option with one site per GitHub account or organization, unlimited project sites, custom domain support via a CNAME file, Jekyll-based blogging with Markdown support, and custom 404 pages with submodules support. There is no practical usage cap in the free offer, so it works well for builders who only need to publish static docs from a repository. Compared with GitBook, it removes the collaborator count issue by shifting the workflow to GitHub itself, but you give up the editor, built-in knowledge-base features, and publishing-specific collaboration tools. It is best when docs can live as static files.

• Beats GitBook: Unbounded static hosting
• Falls short: No built-in docs editor or knowledge-base workflow
• Who should switch: Switch to this if you already write docs in Git and want the simplest free publishing layer possible.

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Mintlify's free tier gives access to the full platform, a custom domain, the web editor, the MCP server, custom components, and agent optimizations. It is a closer all-in-one docs platform than GitBook for teams that want a modern publishing workflow with AI-ready tooling and a built-in editor. The free tier is not described as limited to a single user in the provided facts, so it offers a more flexible starting point for teams than GitBook's one-user ceiling. Where it falls short is that the provided free-tier facts do not spell out concrete usage quotas, so it is harder to compare on hard limits than GitBook.

• Beats GitBook: Broader free platform access for docs teams
• Falls short: No explicit quota details in the free tier facts
• Who should switch: Switch to this if you want a full docs platform feel and need more room than GitBook's single free user.

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Slite's free offer is a 14-day trial with access to Standard plan capabilities, including unlimited docs, AI Answers, AI editor responses, file uploads up to 200 MB, 5 GB attachment storage per user, public API access, integrations, comments, mentions, public sharing with AI answers, doc history, analytics, exports, and guest collaborators. It is much broader than GitBook on collaboration and storage because the trial exposes team-oriented features and no doc-count limit during the trial window. The downside is that it is time-limited rather than perpetual, so it is better for evaluating a workflow than for a long-term free deployment.

• Beats GitBook: More collaboration and storage during the trial
• Falls short: Only a 14-day trial, not perpetual free use
• Who should switch: Switch to this if you need to test a team knowledge base quickly and can accept a trial instead of a permanent free plan.

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Bump.sh's free tier covers up to 10 API docs, up to 3 internal users, up to 20 external users, support for OpenAPI, AsyncAPI, and OpenAPI Overlays, plus CLI and GitHub integration, a custom domain and logo, and documentation hubs. It is aimed at API documentation teams that want doc-as-code publishing with a clear quota structure. Against GitBook, it is stronger when you care about API-doc organization and formal limits for multiple users, but it is narrower because it is tailored to API docs rather than general docs or knowledge bases. It is best for smaller API teams that need a structured starting point.

• Beats GitBook: Clear multi-user API doc quotas
• Falls short: Narrower focus than a general docs platform
• Who should switch: Switch to this if your main job is publishing API docs and you want a free plan with defined team limits.

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