Compare humanoids
Pick two to four robots. Every pair also has its own permanent page, 1,326 in total, generated from the same records.
01
Pick robots
52 humanoidsKepler Forerunner K2 "Bumblebee" is 35 cm taller (175 vs 140 cm) and 56 kg lighter (75 vs 131 kg) than Rainbow Robotics RB-Y1. Kepler Forerunner K2 "Bumblebee" has 32 more degrees of freedom (52 vs 20) and 27 kg more rated payload (30 vs 3 kg) than Rainbow Robotics RB-Y1. Openness score: Kepler Forerunner K2 "Bumblebee" 0, Rainbow Robotics RB-Y1 30 (of 100); only Rainbow Robotics RB-Y1 publishes SIM and SW. Availability for both: buy.
| Field | Kepler Robotics (Shanghai Kepler Exploration Robot Co.)Kepler Forerunner K2 "Bumblebee" | Rainbow RoboticsRainbow Robotics RB-Y1 | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Kepler Robotics (Shanghai Kepler Exploration Robot Co.) | 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) | 75kg | 131kg | −56 kg (-43%) |
| Degrees of freedom (differs) | 52 | 20 | +32 (+160%) |
| Payload (differs) | 30kg | 3kg | +27 kg (+900%) |
| Top speed | —unsourced | 1.5m/s | |
| Runtime | 480min | —unsourced | |
| Battery capacity (differs) | 2,330Wh | 1,250Wh | +1,080 Wh (+86%) |
| Price | 30,000USD | —unsourced | |
| Actuators (differs) | Hybrid roller-screw linear + rotary actuators | Rainbow in-house joint modules | |
| Compute (differs) | 100 TOPS onboard | Dual-PC (real-time robot PC + user PC with ROS 2) | |
| Sensors (differs) | 80+ integrated sensors; tactile dexterous hands | Built-in wrist force/torque sensors (v1.2); optional camera | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 0/ 100 | 30/ 100 | −30 |
| CAD (25) | not public | not public | |
| Bill of materials (20) | not public | not public | |
| Sim model (URDF/MJCF) (20) (differs) | not public | public | |
| Firmware (15) | not public | not public | |
| Software (10) (differs) | not public | public | |
| Trained policies (10) | not public | not public | |
| Verification level (differs) | L0 | L2 | |
| Sources | 2 | 2 | |
| Last checked | 2026-09-24 | 2026-09-24 | |
03
Best-documented pairs
most sourced fields on both sidesHyperspawn DropbearvsPollen Reachy 211fHyperspawn DropbearvsKepler Forerunner K2 "Bumblebee"11fHyperspawn DropbearvsPUDU D911fKepler Forerunner K2 "Bumblebee"vsPollen Reachy 211fPollen Reachy 2vsPUDU D911fKepler Forerunner K2 "Bumblebee"vsPUDU D911fHyperspawn DropbearvsRainbow Robotics RB-Y110fHyperspawn DropbearvsUnitree G110fRainbow Robotics RB-Y1vsUnitree G110fEngineAI PM01vsHyperspawn Dropbear10fEngineAI PM01vsRainbow Robotics RB-Y110fEngineAI PM01vsUnitree G110fHyperspawn DropbearvsK-Scale K-Bot10fHyperspawn DropbearvsUnitree H1-210fK-Scale K-BotvsRainbow Robotics RB-Y110fK-Scale K-BotvsUnitree G110fPollen Reachy 2vsRainbow Robotics RB-Y110fPollen Reachy 2vsUnitree G110fRainbow Robotics RB-Y1vsUnitree H1-210fUnitree G1vsUnitree H1-210fEngineAI PM01vsK-Scale K-Bot10fEngineAI PM01vsPollen Reachy 210fEngineAI PM01vsUnitree H1-210fFigure 02vsHyperspawn Dropbear10f