RIVR TWO vs Spirit 40
Quadruped robot spec comparison — RIVR vs Ghost Robotics.
RIVR
RIVR TWO
80 / 100 Robo2u Score
Second-gen wheeled-legged quadruped for autonomous last-mile delivery right to the doorstep
| Spec | RIVR TWO | Spirit 40 |
|---|---|---|
| Released | 2026-03 | 2020 |
| Status | Deployed | Production |
| Payload | 27 kg | 3 kg |
| Weight | — | 12 kg |
| Degrees of freedom | — | 12 |
| Runtime | — | — |
| Top speed | 3.89 m/s | 2 m/s |
| Price | — | — |
| Robo2u Score | 80 | 47 |
Highlighted = better on that spec (lower is better for price and weight; newer for release). The Robo2u Score is a transparent composite — see the Quadruped Robots for the full field.
