KingRoot came up with the latest version of the app which roots any Android device in just one click. The new version supports Galaxy S6 and bunch of other phones.
Other Samsung phones which are supported now are, Galaxy S5 (4G), Note 3 (4G), Galaxy Core Mini 4G (SM-G3568V ), Galaxy Core Prime 4G (SM-G3608 ), Galaxy GRAND, Galaxy GRAND 2, etc.
Though there are many advantages of rooting your phone, but still you need to keep in mind that if you root your phone you will loose the warranty and KNOX will stop working.
To download KingRoot and to find out the complete list of supported devices head over to XDA Developer forum.
If you are still confused about KingRoot app and how to use it, check the video below.