Documentation in 2026 includes API docs, public product guides, internal knowledge bases, developer documentation, and SOPs. Each serves a different audience, which is why no single tool fits all. This guide compares the best AI documentation tools by use case.

Discover the best developer documentation tools in 2026 with this complete comparison of platforms for API docs internal knowledge bases and unified systems Includes top choices like DocumentationAI Mintlify GitBook and more with pricing features AI support and onboarding performance insights.

API documentation in 2026 is evaluated by onboarding speed, interactive testing, and real-world adoption. This guide compares the best API documentation tools based on API playgrounds, default examples, pricing, and how well they support customer-facing APIs.