Is Slim framework similar to Symfony’s Silex? How do they differ?

Silex is actually based on the Symfony 2 components. It can be considered as an alternative user interface to the components out there. The process of migration here becomes convenient due to the similarity they possess. In Silex, the model and the view parts are totally handled by the third-party libraries.

Silex is considered to have a lighter footprint compared to Symfony. Symfony 4 is good and fast too and has some new stack and benefits for the applications. Silex was in maintenance mode in the year 2018 and is upgraded with new features as a PHP framework.