Reports on the development and market for quadruped robots. In 2021, there are hundreds of quadruped robots in laboratores and out in the field, servicing applications from security and patrolling of worksites to monitoring and inspection of chemical plants. In a world designed for legs, quadrupeds are ideal for these current uses, with an ability to step over pipes, climb stairs, and so on, and to do so while offering improved balance stability over bipedal solutions.