Best 3 Tools for Creating API Documentation in 2025

Mintlify is a documentation platform that transforms markdown files into polished, interactive websites. It works by connecting to your code repository and automatically building documentation sites whenever you make changes. The platform includes an AI assistant that helps write content, suggests improvements, and answers user questions directly in the docs.

Theneo is an AI-native documentation platform that transforms how teams create and manage API documentation. Think of it as having an expert technical writer that works instantly - you provide your API specification files (like OpenAPI, Postman collections, or GraphQL schemas), and Theneo generates complete, interactive documentation automatically.

Apidog is a platform that handles the complete process of creating and managing APIs. You can design your API structure, test how it works, create clear documentation, and share it with your team, all from one application.