Gatsby is an open-source framework that combines functionality from React, GraphQL and Webpack into a single tool for building static websites and apps. Owing to the fast performance of the sites it powers, impressive out-of-the-box features like code splitting, and friendly developer experience, Gatsby is fast becoming a staple of modern web development.
It provides over 2500 plugins to create static sites based on sources as Markdown documents, MDX (Markdown with JSX), images, and numerous Content Management Systems such as WordPress, Drupal and more. Since version 4 Gatsby also supports Server-Side Rendering and Deferred Static Generation for rendering dynamic websites on a Node.js server. Gatsby is developed by Gatsby, Inc. which also offers a cloud service, Gatsby Cloud, for hosting Gatsby websites.