CodeIgniter vs Slim: What are the differences?
Developers describe CodeIgniter as "A Fully Baked PHP Framework". CodeIgniter is a proven, agile & open PHP web application framework with a small footprint. It is powering the next generation of web apps. 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.
CodeIgniter belongs to "Frameworks (Full Stack)" category of the tech stack, while Slim can be primarily classified under "Microframeworks (Backend)".
"Mvc" is the primary reason why developers consider CodeIgniter over the competitors, whereas "Microframework" was stated as the key factor in picking Slim.
CodeIgniter and Slim are both open source tools. It seems that CodeIgniter with 17.4K GitHub stars and 7.72K forks on GitHub has more adoption than Slim with 9.95K GitHub stars and 1.84K GitHub forks.
Webedia, Die Coder GmbH, and Manchester.com are some of the popular companies that use CodeIgniter, whereas Slim is used by Coderus, WebbyLab, and Die Coder GmbH. CodeIgniter has a broader approval, being mentioned in 261 company stacks & 105 developers stacks; compared to Slim, which is listed in 29 company stacks and 21 developer stacks.