Cruzr S2 vs K3 Bumblebee
Humanoid robot spec comparison — UBTECH vs Kepler Robotics.
UBTECH
Cruzr S2
69 / 100 Robo2u Score
Full-size wheeled service humanoid with a ±170° bending torso and 15kg payload handling
Kepler Robotics
K3 Bumblebee
79 / 100 Robo2u Score
Successor to the Forerunner K2 with an added waist joint, 30 kg dual-arm lifting and eight-hour shifts
| Spec | Cruzr S2 | K3 Bumblebee |
|---|---|---|
| Released | 2025 | 2026-07 |
| Status | Production | Pilot |
| Height | 176 cm | — |
| Payload | 15 kg | 30 kg |
| Degrees of freedom | 44 | — |
| Runtime | — | 480 min |
| Top speed | 2 m/s | — |
| Price | — | — |
| Robo2u Score | 69 | 79 |
Highlighted = better on that spec (lower is better for price and weight; newer for release). The Robo2u Score is a transparent composite — see the Humanoid Showdown for the full field.
