Hyperspawn Dropbear vs Kepler Forerunner K2 "Bumblebee"
Generated from the registry · revision 2026-09-26 · openness out of 100
Dropbear is 5 cm taller (180 vs 175 cm) and 30 kg lighter (45 vs 75 kg) than Kepler Forerunner K2 "Bumblebee". Dropbear has 20 fewer degrees of freedom (32 vs 52) and 25 kg less rated payload (5 vs 30 kg) than Kepler Forerunner K2 "Bumblebee". Listed prices: Dropbear $9,999, Kepler Forerunner K2 "Bumblebee" $30,000. Openness score: Dropbear 100, Kepler Forerunner K2 "Bumblebee" 0 (of 100); only Dropbear publishes CAD, BOM, SIM, FW, SW and POL. Availability: Dropbear preorder, Kepler Forerunner K2 "Bumblebee" buy.
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Side by side
■ rows differ| Field | Hyperspawn RoboticsHyperspawn Dropbear | Kepler Robotics (Shanghai Kepler Exploration Robot Co.)Kepler Forerunner K2 "Bumblebee" | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Hyperspawn Robotics | Kepler Robotics (Shanghai Kepler Exploration Robot Co.) | |
| Class | Humanoid | Humanoid | |
| Status | Active | Active | |
| Availability (differs) | Preorder | Buy | |
| Country (differs) | India | China | |
| Year (differs) | 2023 | 2024 | |
| Specifications | |||
| Height (differs) | 180cm | 175cm | +5 cm (+3%) |
| Mass (differs) | 45kg | 75kg | −30 kg (-40%) |
| Degrees of freedom (differs) | 32 | 52 | −20 (-38%) |
| Payload (differs) | 5kg | 30kg | −25 kg (-83%) |
| Top speed | —unsourced | —unsourced | |
| Runtime (differs) | 120min | 480min | −360 min (-75%) |
| Battery capacity (differs) | 960Wh | 2,330Wh | −1,370 Wh (-59%) |
| Price (differs) | 9,999USD | 30,000USD | −20,001 USD (-67%) |
| Actuators (differs) | MyActuator RMD-X10, RMD-X8, RMD-X6 and CEM-60 over 1 Mbit/s CAN (18 per the 2026 BOM; myactuator-can lists 12 RMD-X8 Pro, 4 RMD-X10 V3, 6 CEM-60); 6 NEMA 17 lead-screw steppers in the Stewart-platform neck. hyperspawn.ai: servo + QDD. | Hybrid roller-screw linear + rotary actuators | |
| Compute (differs) | NVIDIA Jetson AGX Orin 64GB (BOM; Orin NX 16GB alternative) plus one ESP32-DevKitC-V4 CAN node per limb. Kit: Raspberry Pi 5 base, Jetson Orin advanced. | 100 TOPS onboard | |
| Sensors (differs) | Intel RealSense D455f depth camera, IMU (center-IMU controller role), foot load cells (4x HX711 per foot, dropbear-feet), actuator encoders; five AS5600 magnetic angle sensors per leg controller (observation-safe firmware) | 80+ integrated sensors; tactile dexterous hands | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 100/ 100 | 0/ 100 | +100 |
| CAD (25) (differs) | public | not public | |
| Bill of materials (20) (differs) | public | not public | |
| Sim model (URDF/MJCF) (20) (differs) | public | not public | |
| Firmware (15) (differs) | public | not public | |
| Software (10) (differs) | public | not public | |
| Trained policies (10) (differs) | public | not public | |
| Verification level (differs) | L2 | L0 | |
| Sources (differs) | 16 | 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: Dropbear, Kepler Forerunner K2 "Bumblebee".
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