Slim vs Akka HTTP: What are the differences?

Developers describe Slim 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. On the other hand, Akka HTTP is detailed as "HTTP client and server built on Akka actors and streams". The Akka HTTP modules implement a full server- and client-side HTTP stack on top of akka-actor and akka-stream. It’s not a web-framework but rather a more general toolkit for providing and consuming HTTP-based services. While interaction with a browser is of course also in scope it is not the primary focus of Akka HTTP.

Slim and Akka HTTP can be categorized as "Microframeworks (Backend)" tools.

Slim is an open source tool with 10.6K GitHub stars and 1.91K GitHub forks. Here's a link to Slim's open source repository on GitHub.