Is La Tale made by the same people as Maplestory

No, Maplestory is made by Nexon while La Tale is made by OGPlanet. It is however a "copy" of maplestory.

Edit: Actually, Maplestory is currently being published by Nexon. Maplestory was developed by Wizet.

Also, La Tale's publisher is OGPlanet and it's developer is Actoz.

Have a nice day.