No, there are no such servers for Minecraft which have been made and released on the internet, but the thing is that the Mojang studios have partnered with different companies like Mineplex and much more so that they can make their own and different kinds of servers, game modes, realms and also other things. The thing about realms is that they are only allowed till someplace only they restrict the people from using that particular server too much, and this is why the normal servers are better than realms. You can get more information by clicking on this link https://minecraft.buzz/.