Booster K1 vs Kepler Forerunner K2 "Bumblebee"
Generated from the registry · revision 2026-09-26 · openness out of 100
Booster K1 is 80 cm shorter (95 vs 175 cm) and 55.5 kg lighter (19.5 vs 75 kg) than Kepler Forerunner K2 "Bumblebee". Booster K1 has 30 fewer degrees of freedom (22 vs 52) than Kepler Forerunner K2 "Bumblebee". Listed prices: Booster K1 $4,999, Kepler Forerunner K2 "Bumblebee" $30,000. Openness score: Booster K1 30, Kepler Forerunner K2 "Bumblebee" 0 (of 100); only Booster K1 publishes SIM and SW. Availability for both: buy.
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Side by side
■ rows differ| Field | Booster RoboticsBooster K1 | Kepler Robotics (Shanghai Kepler Exploration Robot Co.)Kepler Forerunner K2 "Bumblebee" | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Booster Robotics | Kepler Robotics (Shanghai Kepler Exploration Robot Co.) | |
| Class | Humanoid | Humanoid | |
| Status | Active | Active | |
| Availability | Buy | Buy | |
| Country | China | China | |
| Year (differs) | 2025 | 2024 | |
| Specifications | |||
| Height (differs) | 95cm | 175cm | −80 cm (-46%) |
| Mass (differs) | 19.5kg | 75kg | −55.5 kg (-74%) |
| Degrees of freedom (differs) | 22 | 52 | −30 (-58%) |
| Payload | —unsourced | 30kg | |
| Top speed | —unsourced | —unsourced | |
| Runtime (differs) | 40min | 480min | −440 min (-92%) |
| Battery capacity | —unsourced | 2,330Wh | |
| Price (differs) | 4,999USD | 30,000USD | −25,001 USD (-83%) |
| Actuators (differs) | Dual-encoder actuators | Hybrid roller-screw linear + rotary actuators | |
| Compute (differs) | NVIDIA Jetson Orin NX 8GB (117 TOPS) base; up to 200 TOPS tier | 100 TOPS onboard | |
| Sensors (differs) | RGB-D camera, 9-axis IMU, microphone array | 80+ integrated sensors; tactile dexterous hands | |
| 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) | L1 | L0 | |
| 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: Booster K1, Kepler Forerunner K2 "Bumblebee".
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