Kepler Forerunner K2 "Bumblebee" vs K-Scale Z-Bot (Zeroth Bot)
Generated from the registry · revision 2026-09-26 · openness out of 100
Kepler Forerunner K2 "Bumblebee" is 129 cm taller (175 vs 46 cm) than Z-Bot (Zeroth Bot). Kepler Forerunner K2 "Bumblebee" has 34 more degrees of freedom (52 vs 18) than Z-Bot (Zeroth Bot). Listed prices: Kepler Forerunner K2 "Bumblebee" $30,000, Z-Bot (Zeroth Bot) $999. Openness score: Kepler Forerunner K2 "Bumblebee" 0, Z-Bot (Zeroth Bot) 90 (of 100); only Z-Bot (Zeroth Bot) publishes CAD, BOM, SIM, FW and SW. Availability: Kepler Forerunner K2 "Bumblebee" buy, Z-Bot (Zeroth Bot) diy build.
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Side by side
■ rows differ| Field | Kepler Robotics (Shanghai Kepler Exploration Robot Co.)Kepler Forerunner K2 "Bumblebee" | K-Scale LabsK-Scale Z-Bot (Zeroth Bot) | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Kepler Robotics (Shanghai Kepler Exploration Robot Co.) | K-Scale Labs | |
| Class | Humanoid | Humanoid | |
| Status (differs) | Active | Orphaned | |
| Availability (differs) | Buy | DIY build | |
| Country (differs) | China | United States | |
| Year (differs) | 2024 | 2025 | |
| Specifications | |||
| Height (differs) | 175cm | 46cm | +129 cm (+280%) |
| Mass | 75kg | —unsourced | |
| Degrees of freedom (differs) | 52 | 18 | +34 (+189%) |
| Payload | 30kg | —unsourced | |
| Top speed | —unsourced | —unsourced | |
| Runtime | 480min | —unsourced | |
| Battery capacity | 2,330Wh | —unsourced | |
| Price (differs) | 30,000USD | 999USD | +29,001 USD (+2903%) |
| Actuators (differs) | Hybrid roller-screw linear + rotary actuators | 18 servo motors | |
| Compute | 100 TOPS onboard | —unsourced | |
| Sensors (differs) | 80+ integrated sensors; tactile dexterous hands | cameras, IMU (per press) | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 0/ 100 | 90/ 100 | −90 |
| CAD (25) (differs) | not public | public | |
| Bill of materials (20) (differs) | not public | public | |
| Sim model (URDF/MJCF) (20) (differs) | not public | public | |
| Firmware (15) (differs) | not public | public | |
| Software (10) (differs) | not public | public | |
| Trained policies (10) | not public | not public | |
| Verification level (differs) | L0 | L1 | |
| Sources (differs) | 2 | 3 | |
| 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: Kepler Forerunner K2 "Bumblebee", Z-Bot (Zeroth Bot).
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