Rainbow Robotics RB-Y1 vs Stanford ToddlerBot
Generated from the registry · revision 2026-09-26 · openness out of 100
Rainbow Robotics RB-Y1 is 84 cm taller (140 vs 56 cm) and 127.6 kg heavier (131 vs 3.4 kg) than ToddlerBot. Rainbow Robotics RB-Y1 has 10 fewer degrees of freedom (20 vs 30) and 1.52 kg more rated payload (3 vs 1.48 kg) than ToddlerBot. Openness score: Rainbow Robotics RB-Y1 30, ToddlerBot 100 (of 100); only ToddlerBot publishes CAD, BOM, FW and POL. Availability: Rainbow Robotics RB-Y1 buy, ToddlerBot diy build.
01
Side by side
■ rows differ| Field | Rainbow RoboticsRainbow Robotics RB-Y1 | Stanford UniversityStanford ToddlerBot | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Rainbow Robotics | Stanford University | |
| Class (differs) | Wheeled humanoid | Humanoid | |
| Status (differs) | Active | Research | |
| Availability (differs) | Buy | DIY build | |
| Country (differs) | South Korea | United States | |
| Year (differs) | 2024 | 2025 | |
| Specifications | |||
| Height (differs) | 140cm | 56cm | +84 cm (+150%) |
| Mass (differs) | 131kg | 3.4kg | +127.6 kg (+3753%) |
| Degrees of freedom (differs) | 20 | 30 | −10 (-33%) |
| Payload (differs) | 3kg | 1.48kg | +1.52 kg (+103%) |
| 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 actuators; 7 DOF/arm, 6 DOF/leg, 2 neck, 2 waist | |
| Compute (differs) | Dual-PC (real-time robot PC + user PC with ROS 2) | NVIDIA Jetson Orin NX 16GB | |
| Sensors | Built-in wrist force/torque sensors (v1.2); optional camera | —unsourced | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 30/ 100 | 100/ 100 | −70 |
| CAD (25) (differs) | not public | public | |
| Bill of materials (20) (differs) | not public | public | |
| Sim model (URDF/MJCF) (20) | public | public | |
| Firmware (15) (differs) | not public | public | |
| Software (10) | public | public | |
| Trained policies (10) (differs) | not public | public | |
| Verification level | L2 | L2 | |
| Sources (differs) | 2 | 3 | |
| Last checked (differs) | 2026-09-24 | 2026-09-25 | |
A dash is an unsourced figure, not zero. Sources for each robot are listed on its spec sheet: Rainbow Robotics RB-Y1, ToddlerBot.
02
Related comparisons
Rainbow Robotics RB-Y1vsPAL KangarooRainbow Robotics RB-Y1vsFourier GR-1Rainbow Robotics RB-Y1vsPAL TALOSRainbow Robotics RB-Y1vsBoston Atlas (electric)Rainbow Robotics RB-Y1vsPollen Reachy 2ToddlerBotvsROBOTIS OP3ToddlerBotvsK-Scale Z-Bot (Zeroth Bot)ToddlerBotvsPoppy HumanoidToddlerBotvsNoetix Bumi