At first there was the AMD Mantel API and the game engine devs of EA Dice (Frostbite), from their experience Vulcan and the slightly different DirectX12 branche

At first there was the AMD Mantel API and the game engine devs of EA Dice (Frostbite), from their experience Vulcan and the slightly different DirectX12 branched off. At the moment it seems Vulcan has more support than DirectX12. (OpenGL and DirectX up to v11 were older higher level APIs.) https://en.wikipedia.org/wiki/Mantle_(API) https://en.wikipedia.org/wiki/Mantle_(API)