Rainbow Robotics RB-Y1 vs UBTech Walker S (S1 / S2)
Generated from the registry · revision 2026-09-26 · openness out of 100
Rainbow Robotics RB-Y1 has 12 kg less rated payload (3 vs 15 kg) than UBTech Walker S (S1 / S2). Openness score: Rainbow Robotics RB-Y1 30, UBTech Walker S (S1 / S2) 0 (of 100); only Rainbow Robotics RB-Y1 publishes SIM and SW. Availability for both: buy.
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Side by side
■ rows differ| Field | Rainbow RoboticsRainbow Robotics RB-Y1 | UBTech RoboticsUBTech Walker S (S1 / S2) | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Rainbow Robotics | UBTech Robotics | |
| Class (differs) | Wheeled humanoid | Humanoid | |
| Status | Active | Active | |
| Availability | Buy | Buy | |
| Country (differs) | South Korea | China | |
| Year (differs) | 2024 | 2023 | |
| Specifications | |||
| Height | 140cm | —unsourced | |
| Mass | 131kg | —unsourced | |
| Degrees of freedom | 20 | —unsourced | |
| Payload (differs) | 3kg | 15kg | −12 kg (-80%) |
| Top speed | 1.5m/s | —unsourced | |
| Runtime | —unsourced | —unsourced | |
| Battery capacity | 1,250Wh | —unsourced | |
| Price | —unsourced | —unsourced | |
| Actuators (differs) | Rainbow in-house joint modules | Servo joints with force feedback | |
| Compute (differs) | Dual-PC (real-time robot PC + user PC with ROS 2) | BrainNet 2.0 + Co-Agent (UBTech software) | |
| Sensors (differs) | Built-in wrist force/torque sensors (v1.2); optional camera | RGB binocular stereo vision (S2) | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 30/ 100 | 0/ 100 | +30 |
| CAD (25) | not public | not public | |
| Bill of materials (20) | not public | not public | |
| Sim model (URDF/MJCF) (20) (differs) | public | not public | |
| Firmware (15) | not public | not public | |
| Software (10) (differs) | public | not public | |
| Trained policies (10) | not public | not public | |
| Verification level (differs) | L2 | L0 | |
| Sources (differs) | 2 | 3 | |
| Last checked | 2026-09-24 | 2026-09-24 | |
A dash is an unsourced figure, not zero. Sources for each robot are listed on its spec sheet: Rainbow Robotics RB-Y1, UBTech Walker S (S1 / S2).
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