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 humanoidsNo height, mass, DOF or payload figure is sourced for both Z-Bot (Zeroth Bot) and UBTech Walker S (S1 / S2) yet. Openness score: Z-Bot (Zeroth Bot) 90, UBTech Walker S (S1 / S2) 0 (of 100); only Z-Bot (Zeroth Bot) publishes CAD, BOM, SIM, FW and SW. Availability: Z-Bot (Zeroth Bot) diy build, UBTech Walker S (S1 / S2) buy.
| Field | K-Scale LabsK-Scale Z-Bot (Zeroth Bot) | UBTech RoboticsUBTech Walker S (S1 / S2) | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | K-Scale Labs | UBTech Robotics | |
| Class | Humanoid | Humanoid | |
| Status (differs) | Orphaned | Active | |
| Availability (differs) | DIY build | Buy | |
| Country (differs) | United States | China | |
| Year (differs) | 2025 | 2023 | |
| Specifications | |||
| Height | 46cm | —unsourced | |
| Mass | —unsourced | —unsourced | |
| Degrees of freedom | 18 | —unsourced | |
| Payload | —unsourced | 15kg | |
| Top speed | —unsourced | —unsourced | |
| Runtime | —unsourced | —unsourced | |
| Battery capacity | —unsourced | —unsourced | |
| Price | 999USD | —unsourced | |
| Actuators (differs) | 18 servo motors | Servo joints with force feedback | |
| Compute | —unsourced | BrainNet 2.0 + Co-Agent (UBTech software) | |
| Sensors (differs) | cameras, IMU (per press) | RGB binocular stereo vision (S2) | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 90/ 100 | 0/ 100 | +90 |
| 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) | not public | not public | |
| Verification level (differs) | L1 | L0 | |
| Sources | 3 | 3 | |
| Last checked | 2026-09-24 | 2026-09-24 | |
03
Best-documented pairs
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