Quadruped or humanoid: choosing the right robot for inspection

When a facilities team first considers a robot for inspection, the humanoid tends to grab the imagination. For most inspection and patrol work, though, the quadruped is the better tool, and understanding why saves money.

A four-legged platform like the Unitree Go2 or B2 is stable by design. It carries sensors across gravel, stairs, slopes and rubble without the balance overhead a bipedal robot spends on simply staying upright. With 360 degree LiDAR and long endurance, it maps a site and repeats a patrol route reliably, shift after shift.

The humanoid earns its place where the environment is built for human bodies and human tools, reaching a valve, operating a control designed for hands, or interacting with people face to face. If the job is to walk a perimeter, read gauges and flag anomalies, that dexterity is cost you do not need.

A simple rule of thumb: if the task is move, sense and report, choose a quadruped. If the task is move, sense and manipulate in a human space, look at a humanoid. When you are unsure, the fastest way to decide is to watch both do your actual job, which is exactly what a demo is for.