Sphinx vs Stoplight Elements

Sphinx is a free Python application that generates technical documentation from structured text. Authors can use reStructuredText or MyST Markdown; Markdown requires installing MyST-Parser separately. Built-in builders produce HTML, LaTeX for PDF, ePub, manual pages, Texinfo, and plain text. References can link sections, figures, tables, citations, glossaries, and code objects within one project or across projects. The autodoc extension imports documented modules and includes material from their docstrings. Themes and extensions, both built-in and third-party, add options such as diagrams, doctests, and API documentation. Other built-in extensions provide GitHub Pages publishing, Graphviz graphs, and intersphinx links. Sphinx also supports gettext-based translation and full-text search. It can be installed through Python and platform package managers, Docker, or from source, then deployed to services such as Read the Docs, GitHub Pages, GitLab Pages, Netlify, or self-hosted servers. Its code is released under the two-clause BSD license, and the project is community supported.

Stoplight Elements is a free, open-source set of embeddable web components for building interactive API documentation from OpenAPI documents. It adds customizable left navigation and a three-column layout, while an embedded console lets readers try requests and inspect responses within the documentation. Elements supports OpenAPI, including version 3.1, and JSON Schema. It provides code samples in Curl, Python, Ruby, and Java, and its Stoplight-flavored Markdown supports tabs, callouts, and embedded JSON examples. The components require no build steps and can be used with any framework or HTML project. Documentation can be hosted anywhere, including S3 or GitHub. Elements can point to an OpenAPI document or a Stoplight Workspace and can work with any OpenAPI editor. The listed plan costs nothing and includes OpenAPI 3.1 support, an interactive API console, embedding into an existing CMS, and hosting anywhere. Compared with Elements DevPortal, the product page does not list multiple API listings, mocking, Markdown articles, branch version selection, or search. Stoplight identifies SmartBear as its parent company.