The HopeJR vs K-Scale Z-Bot (Zeroth Bot)
Generated from the registry · revision 2026-09-26 · openness out of 100
HopeJR has 48 more degrees of freedom (66 vs 18) than Z-Bot (Zeroth Bot). Listed prices: HopeJR $3,000, Z-Bot (Zeroth Bot) $999. Both score 90/100 on openness. Availability for both: diy build.
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Side by side
■ rows differ| Field | The Robot Studio & Hugging FaceThe HopeJR | K-Scale LabsK-Scale Z-Bot (Zeroth Bot) | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | The Robot Studio & Hugging Face | K-Scale Labs | |
| Class | Humanoid | Humanoid | |
| Status (differs) | Active | Orphaned | |
| Availability | DIY build | DIY build | |
| Country (differs) | France | United States | |
| Year | 2025 | 2025 | |
| Specifications | |||
| Height | —unsourced | 46cm | |
| Mass | —unsourced | —unsourced | |
| Degrees of freedom (differs) | 66 | 18 | +48 (+267%) |
| Payload | —unsourced | —unsourced | |
| Top speed | —unsourced | —unsourced | |
| Runtime | —unsourced | —unsourced | |
| Battery capacity | —unsourced | —unsourced | |
| Price (differs) | 3,000USD | 999USD | +2,001 USD (+200%) |
| Actuators (differs) | Robstride 02 (humanoid body update) | 18 servo motors | |
| Compute | —unsourced | —unsourced | |
| Sensors | —unsourced | cameras, IMU (per press) | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score | 90/ 100 | 90/ 100 | = |
| CAD (25) | public | public | |
| Bill of materials (20) | public | public | |
| Sim model (URDF/MJCF) (20) | public | public | |
| Firmware (15) | public | public | |
| Software (10) | public | public | |
| Trained policies (10) | not public | not public | |
| Verification level | L1 | L1 | |
| Sources (differs) | 4 | 3 | |
| 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: HopeJR, Z-Bot (Zeroth Bot).
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