When comparing Middleman vs Gatsby JS, the Slant community recommends Middleman for most people. In the question“What are the best static site generators?” Middleman is ranked 4th while Gatsby JS is ranked 8th. The most important reason people chose Middleman is:
[Minification and compression](http://middlemanapp.com/advanced/file-size-optimization/index.html) are as easy as setting a few configuration options, and [unique asset hashes](http://middlemanapp.com/advanced/improving-cacheability/) are available to allow you to invalidate the cache of files that change regularly.
Ranked in these QuestionsQuestion Ranking
Pro Support for a variety of templating languages and preprocessors
Middleman supports lots of compiled languages, such as Less, Markdown, Textile, CoffeeScript, Stylus and more.
Pro Extensible and flexible
Middleman has a resources page full of official and community extensions.
Pro External pipeline management with Webpack
Replace your Gulp, Grunt, Bower configs
Pro Embraces Rails conventions
Middleman follows established conventions so if you know rails, you can easily pick up middleman.
Pro Easy deployment options
Pro No page reload when navigating
Pro Based on React.js
Editing markup is phenomenally easy when you have components.
Pro Live reload
Every change you make can be almost immediately seen in a browser.
Pro Open Source
Pro A static site and a React app in one
The static pages are generated by Server Site Rendering of the React app. So you have all benefits of a static site, and all benefits of a React app, which is very powerful.
Pro Take content from any source
Gatsby can generate the pages with content from any sources like Drupal, Wordpress, Contentful, etc. If the source plugin is not coded for your solution, you can create it.
Pro A lot of plugins
Gatsby offers a lot of plugins to integrate tools like SASS, typescript, styled components, etc.
Pro Very active development
Gatsby is very actively developed and the maintainers are very helpful.
Pro A lot of examples
Gatsby have a lot of examples sites in his github repository.
Pro GraphQL Data Layer
Pro Beautiful out-of-the-box blog starters
Pro Built-in code and data splitting
Con Too much magic happens
For new users it is hard to understand what is going on and why.
Con A little more complicated than other static site generators
Middleman is a big piece of software, it's not simply a static blog generator. Because of all the functionality and flexibility it offers it can be a little more complex than other static site generators and a little harder to learn all of its bells and whistles.
Con A bit raw
You'll maybe have to tweak some JSX if you want something that's not covered by available themes.