Should I use Stoplight or GitBook for developer documentation?

It depends on what kind of developer documentation you’re trying to build.

Quick rule of thumb

• Choose Stoplight if your docs are primarily API-first and you want strong support for OpenAPI, interactive API references, mocking, and design workflows.
• Choose GitBook if you want a general-purpose documentation site for product docs, developer guides, onboarding, and you care more about writing/publishing experience than API tooling.

Stoplight is better if you need

• API design and documentation in one place
• OpenAPI/Swagger-first workflows
• Interactive API docs
• Mock servers / contract-driven development
• Validation and governance around API specs
• Developer portal style documentation

GitBook is better if you need

• Clean, easy-to-write docs for humans
• Broader docs beyond APIs
• Strong collaboration and editorial workflow
• Simple publishing with good UX
• A knowledge base or docs site for SDKs, guides, and internal/external docs

Biggest difference

• Stoplight = API tooling + docs
• GitBook = documentation platform + docs

If you’re documenting APIs specifically

Stoplight usually wins because it’s built for that use case.

If you’re documenting a developer experience broadly

GitBook is often the better choice because it’s more flexible and easier for non-technical contributors.

A practical recommendation

• Use Stoplight for API reference and API design
• Use GitBook for tutorials, onboarding, conceptual guides, and product docs

Many teams even use both.

If you want, I can give you a decision table by use case, team size, and budget.