Fourier GR-2 vs Rainbow Robotics RB-Y1
Generated from the registry · revision 2026-09-26 · openness out of 100
Fourier GR-2 is 35 cm taller (175 vs 140 cm) and 68 kg lighter (63 vs 131 kg) than Rainbow Robotics RB-Y1. Fourier GR-2 has 33 more degrees of freedom (53 vs 20) than Rainbow Robotics RB-Y1. Both list the same payload (3 kg). Both score 30/100 on openness. Availability for both: buy.
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Side by side
■ rows differ| Field | Fourier (Fourier Intelligence)Fourier GR-2 | Rainbow RoboticsRainbow Robotics RB-Y1 | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Fourier (Fourier Intelligence) | Rainbow Robotics | |
| Class (differs) | Humanoid | Wheeled humanoid | |
| Status | Active | Active | |
| Availability | Buy | Buy | |
| Country (differs) | China | South Korea | |
| Year | 2024 | 2024 | |
| Specifications | |||
| Height (differs) | 175cm | 140cm | +35 cm (+25%) |
| Mass (differs) | 63kg | 131kg | −68 kg (-52%) |
| Degrees of freedom (differs) | 53 | 20 | +33 (+165%) |
| Payload | 3kg | 3kg | = |
| Top speed | —unsourced | 1.5m/s | |
| Runtime | 120min | —unsourced | |
| Battery capacity | —unsourced | 1,250Wh | |
| Price | —unsourced | —unsourced | |
| Actuators (differs) | Fourier FSA 2.0 actuators (>380 N·m peak) | Rainbow in-house joint modules | |
| Compute | —unsourced | Dual-PC (real-time robot PC + user PC with ROS 2) | |
| Sensors | —unsourced | Built-in wrist force/torque sensors (v1.2); optional camera | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score | 30/ 100 | 30/ 100 | = |
| CAD (25) | not public | not public | |
| Bill of materials (20) | not public | not public | |
| Sim model (URDF/MJCF) (20) | public | public | |
| Firmware (15) | not public | not public | |
| Software (10) | public | public | |
| Trained policies (10) | not public | not public | |
| Verification level (differs) | L1 | L2 | |
| Sources | 2 | 2 | |
| 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: Fourier GR-2, Rainbow Robotics RB-Y1.
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