Legged & humanoid robots

Quadruped (robot dog)

A four-legged robot that walks over rough ground and stairs carrying cameras, gas sensors or thermal imagers on autonomous inspection rounds.

Good at

Routine inspection rounds in plants built for people: stairs, gratings, cluttered floors.

Watch out for

Short runtimes; expensive; a wheeled robot or fixed sensor is often cheaper where the floor allows.

Specs that matter for this type

  • Payload
  • Runtime / flight time
  • Top speed
  • Weight
  • Ingress protection (IP)
  • Operating temperature
  • Max step height
  • Sensors

Jobs it does

Usually the main robot for

Also used for

Models we've catalogued

How to read this. Specs come from each maker's own spec page or datasheet, with the link and the date we checked it. Blank means the maker doesn't publish it (or we haven't found it). Scores are a whirrwork assessment, not a lab test: we only score a model when independent trials or tests exist. Methodology.

ModelPayloadRuntime / flight timeTop speedWeightOperating temperatureMax step heightAssessment
Boston Dynamics Spot
Boston Dynamics
14 kg90 min1.6 m/s33.8 kg-20 to 55 °C0.3 m58/100
Ghost Robotics Vision 60
Ghost Robotics
10 kg189 min2.4 m/s51 kg-40 to 55 °C–Not enough evidence to rate
Unitree B2
Unitree Robotics
40 kg300 min6 m/s60 kg–0.4 mNot enough evidence to rate
Unitree Go2
Unitree Robotics
–120 to 240 min–15 kg––Not enough evidence to rate
Compare side by side (pick 2 to 4)

Also called: quadruped, quadruped robot.