Gatsby is more popular than Eleventy in terms of community adoption and usage. Gatsby has gained significant popularity due to its powerful features, extensive plugin ecosystem, and strong support for building static websites and progressive web applications.
Eleventy is a simpler and more lightweight static site generator compared to Gatsby. It focuses on simplicity, speed, and easy customization. On the other hand, Gatsby is a more comprehensive framework that uses React and GraphQL to build static websites with a rich developer experience.
Eleventy provides more flexibility in terms of choosing your own stack, templating language, and asset pipeline. It supports a wide range of templating languages and allows you to use your preferred build tools. Gatsby, with its React and GraphQL approach, provides a more opinionated setup and is well-suited for larger, data-intensive websites.
Eleventy is known for its exceptional performance due to its simple architecture and minimal build process. It generates static HTML files that are fast to load. Gatsby, although powerful, can have a longer build time due to its more complex webpack-based build process and dynamic rendering of pages.
Both Eleventy and Gatsby have extension ecosystems where you can find plugins to extend their functionality. Gatsby has a larger plugin ecosystem with more options and support due to its popularity, while Eleventy's ecosystem is smaller but growing steadily.