K-Scale K-Bot vs Rainbow Robotics RB-Y1
Generated from the registry · revision 2026-09-26 · openness out of 100
K-Bot is 97 kg lighter (34 vs 131 kg) than Rainbow Robotics RB-Y1. K-Bot has 7 kg more rated payload (10 vs 3 kg) than Rainbow Robotics RB-Y1. Both list the same height (140 cm) and degrees of freedom (20). Openness score: K-Bot 100, Rainbow Robotics RB-Y1 30 (of 100); only K-Bot publishes CAD, BOM, FW and POL. Availability: K-Bot diy build, Rainbow Robotics RB-Y1 buy.
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Side by side
■ rows differ| Field | K-Scale LabsK-Scale K-Bot | Rainbow RoboticsRainbow Robotics RB-Y1 | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | K-Scale Labs | Rainbow Robotics | |
| Class (differs) | Humanoid | Wheeled humanoid | |
| Status (differs) | Discontinued | Active | |
| Availability (differs) | DIY build | Buy | |
| Country (differs) | United States | South Korea | |
| Year (differs) | 2025 | 2024 | |
| Specifications | |||
| Height | 140cm | 140cm | = |
| Mass (differs) | 34kg | 131kg | −97 kg (-74%) |
| Degrees of freedom | 20 | 20 | = |
| Payload (differs) | 10kg | 3kg | +7 kg (+233%) |
| Top speed | —unsourced | 1.5m/s | |
| Runtime | 240min | —unsourced | |
| Battery capacity | —unsourced | 1,250Wh | |
| Price | 8,999USD | —unsourced | |
| Actuators (differs) | RobStride RS00 x2, RS02 x6, RS03 x8, RS04 x4 | Rainbow in-house joint modules | |
| Compute (differs) | Raspberry Pi 5 | Dual-PC (real-time robot PC + user PC with ROS 2) | |
| Sensors (differs) | cameras, microphones, head sensor array | Built-in wrist force/torque sensors (v1.2); optional camera | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 100/ 100 | 30/ 100 | +70 |
| CAD (25) (differs) | public | not public | |
| Bill of materials (20) (differs) | public | not public | |
| Sim model (URDF/MJCF) (20) | public | public | |
| Firmware (15) (differs) | public | not public | |
| Software (10) | public | public | |
| Trained policies (10) (differs) | public | not public | |
| Verification level (differs) | L1 | L2 | |
| Sources (differs) | 7 | 2 | |
| Last checked (differs) | 2026-09-25 | 2026-09-24 | |
A dash is an unsourced figure, not zero. Sources for each robot are listed on its spec sheet: K-Bot, Rainbow Robotics RB-Y1.
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