Engineered Ameca vs ROBOTIS OP3
Generated from the registry · revision 2026-09-26 · openness out of 100
Ameca is 136 cm taller (187 vs 51 cm) and 58.5 kg heavier (62 vs 3.5 kg) than ROBOTIS OP3. Ameca has 41 more degrees of freedom (61 vs 20) than ROBOTIS OP3. Openness score: Ameca 0, ROBOTIS OP3 45 (of 100); only ROBOTIS OP3 publishes SIM, FW and SW. Availability for both: buy.
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Side by side
■ rows differ| Field | Engineered ArtsEngineered Ameca | ROBOTISROBOTIS OP3 | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Engineered Arts | ROBOTIS | |
| Class | Humanoid | Humanoid | |
| Status | Active | Active | |
| Availability | Buy | Buy | |
| Country (differs) | United Kingdom | South Korea | |
| Year | 2021 | —unsourced | |
| Specifications | |||
| Height (differs) | 187cm | 51cm | +136 cm (+267%) |
| Mass (differs) | 62kg | 3.5kg | +58.5 kg (+1671%) |
| Degrees of freedom (differs) | 61 | 20 | +41 (+205%) |
| Payload | —unsourced | —unsourced | |
| Top speed | —unsourced | —unsourced | |
| Runtime | —unsourced | —unsourced | |
| Battery capacity | —unsourced | 36.6Wh | |
| Price | —unsourced | —unsourced | |
| Actuators (differs) | Electric; 27 DOF head/face, 34 DOF upper body | 20x Dynamixel XM430-W350-R | |
| Compute (differs) | Embedded robot PC; Tritium robotOS (Linux/Yocto) | Intel NUC i3, 8GB RAM | |
| Sensors (differs) | 2x 8MP eye cameras, binaural mics, 4-ch chest mic, LiDAR safety sensors | Logitech C920 camera, 9-axis IMU | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 0/ 100 | 45/ 100 | −45 |
| CAD (25) | not public | not public | |
| Bill of materials (20) | not public | not 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 | L2 | |
| 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: Ameca, ROBOTIS OP3.
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