9 AI Documentation Generators for Codebases

A study by Xia and colleagues highlights that developers spend a significant portion of their time, up to 58%, on understanding existing code rather than writing new code, a challenge that a new class of AI-driven documentation tools aims to address. These tools automatically generate documentation from codebases, ensuring that documentation is kept in sync with code changes, thus bridging the gap left by traditional documentation practices. Nine such tools are evaluated, each with unique strengths: DeepWiki offers a browsable wiki for GitHub repositories; Mintlify combines a polished docs site with an AI writing agent; Swimm provides documentation that stays coupled to specific code lines. Other tools like ReadMe and Theneo focus on API documentation, while Penify and CodeGPT handle inline documentation within code editors. The evaluation, conducted without sponsorship, emphasizes the importance of choosing tools based on the specific documentation needs of a team, whether it be understanding public repos, maintaining API references, or generating inline docstrings, with a strong recommendation for keeping a human in the review loop for accuracy.

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