Lumen is a dazzling fast micro-framework by Laravel. From version 5.2, Lumen no longer contains sessions and views in its framework resulting in much leaner framework than Laravel. This inclines it more towards stateless APIs.
With getting rid of a lot of elements which don’t play well with stateless APIs, Lumen has managed to slim down by a great deal making it into a very fast & lightweight provision over other such frameworks. Lumen has been designed to be fast since its inception and thus, it is a suitable framework for speed dependent implementations. With being simple in syntax, it is easier to be deployed.
With having the intimate relation with Laravel, Lumen projects can be dropped into Laravel installation for instant functionalities. This means that everything written on Lumen can function with Laravel with all of its benefits & features.