HAML vs Slim: What are the differences?

Developers describe HAML as "HTML Abstraction Markup Language - A Markup Haiku". Haml is a markup language that’s used to cleanly and simply describe the HTML of any web document, without the use of inline code. Haml functions as a replacement for inline page templating systems such as PHP, ERB, and ASP. However, Haml avoids the need for explicitly coding HTML into the template, because it is actually an abstract description of the HTML, with some code to generate dynamic content. On the other hand, Slim is detailed as "A PHP micro framework". Slim is easy to use for both beginners and professionals. Slim favors cleanliness over terseness and common cases over edge cases. Its interface is simple, intuitive, and extensively documented — both online and in the code itself.

HAML belongs to "Languages" category of the tech stack, while Slim can be primarily classified under "Microframeworks (Backend)".

"Clean and simple" is the top reason why over 66 developers like HAML, while over 27 developers mention "Microframework" as the leading cause for choosing Slim.

HAML and Slim are both open source tools. It seems that Slim with 9.95K GitHub stars and 1.84K forks on GitHub has more adoption than HAML with 3.44K GitHub stars and 544 GitHub forks.

According to the StackShare community, HAML has a broader approval, being mentioned in 113 company stacks & 40 developers stacks; compared to Slim, which is listed in 29 company stacks and 21 developer stacks.