GatsbyJS is a free and open-source static site generator based on React. It uses a modern development stack including Webpack, GraphQL, and modern JavaScript and CSS frameworks. It also provides a rich set of plugins, starters, and themes.

React is a widely used JavaScript library for building user interfaces and single-page applications. It follows a component-based architecture and uses a virtual DOM to efficiently update and render UI components

Contentful is a headless content management system (CMS) that provides a flexible and scalable platform for creating, managing, and delivering digital content across multiple channels and devices.

Gridsome is a Vue.js-based static site generator that makes it easy to build fast and flexible websites and applications by leveraging modern web technologies like GraphQL, Webpack, and hot reloading