Best 7 Tools for Building Developer Portals in 2025

Readme is a platform that lets you create and publish interactive developer documentation for your APIs. Unlike traditional documentation tools, Readme automatically generates API references from your OpenAPI or Swagger files and keeps everything in sync with your code.

GitBook is a cloud-based tool designed specifically for creating documentation. Think of it as a specialized writing platform where you can build everything from simple user guides to complex API documentation. The platform uses a block-based editor, similar to modern website builders, making it easy to add text, images, code examples, and other content without coding knowledge.

NoDocs is a web-based platform that makes creating documentation easy. You type and format your content just like you would in a word processor, and it automatically turns into professional-looking web pages. You do not need any coding skills to use it.

DeveloperHub is a complete documentation tool that combines writing, publishing, and tracking in one place. You can create different types of content including API references, how-to guides, release notes, and knowledge bases all in the same project.

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.

Redocly is an API documentation platform that helps you build professional developer portals. You start with an OpenAPI file that describes your API, and Redocly transforms it into clean, readable documentation with examples and interactive features.