Lumen vs Slim: What are the differences?

Developers describe Lumen as "The stunningly fast PHP micro-framework by Laravel". Laravel Lumen is a stunningly fast PHP micro-framework for building web applications with expressive, elegant syntax. We believe development must be an enjoyable, creative experience to be truly fulfilling. Lumen attempts to take the pain out of development by easing common tasks used in the majority of web projects, such as routing, database abstraction, queueing, and caching. 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.

Lumen and Slim can be primarily classified as "Microframeworks (Backend)" tools.

"API" is the primary reason why developers consider Lumen over the competitors, whereas "Microframework" was stated as the key factor in picking Slim.

Lumen and Slim are both open source tools. It seems that Slim with 9.92K GitHub stars and 1.84K forks on GitHub has more adoption than Lumen with 6.29K GitHub stars and 833 GitHub forks.

Next, Index.co, and Uptime Robot are some of the popular companies that use Lumen, whereas Slim is used by Coderus, WebbyLab, and Die Coder GmbH. Lumen has a broader approval, being mentioned in 24 company stacks & 24 developers stacks; compared to Slim, which is listed in 26 company stacks and 19 developer stacks.