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Loona vs Stretch 4
Quick verdict
Loona leads on 6 of 11 comparable rows
Loona leads on Readiness Score, Reality Score, Price, and Countries (+2 more). Stretch 4 leads on Battery, Mobility, Manipulation, and Perception (+1 more).
Who should choose which?
Choose Loona if…
- You want higher readiness (90/100 vs peers) for near-term home use.
- Verified shipping and public proof matter more to you (reality score 86/100).
- Budget is a priority and Loona lists lower ($442).
- Your main goal is conversation, which Loona targets directly.
- Strengths like social interaction and autonomy match how you plan to use it at home.
Choose Stretch 4 if…
- Your main goal is home assistant, which Stretch 4 targets directly.
- Strengths like perception and manipulation match how you plan to use it at home.
- You prefer a other form factor over the alternatives in this compare.
| Spec | Loona  KEYi TechLeads 6 | Stretch 4  Hello RobotLeads 5 |
|---|---|---|
| Performance | ||
| Readiness Score | 90 | 84 |
| Reality Score | 86 | 80 |
| Data Freshness | 100% | 100% |
| Speed | Unknown | 2.2 km/h |
| Payload | Unknown | 2.5 kg (extended) / 4 kg (retracted) |
| Specs | ||
| Height | 17 cm | 160 cm |
| Weight | 1.1 kg | 46 kg |
| Battery | 2 h | 8 h |
| Form | Animal-like | Other |
| Availability | ||
| Price | $442 | $29,950 |
| Market Status | Buy Now | Buy Now |
| Availability | Available | Limited |
| Countries | United States, United Kingdom, Germany, Canada, Australia, Singapore, France | United States, Global (direct order) |
| Intelligence | ||
| Mobility | 72 | 82 |
| Manipulation | 12 | 88 |
| Perception | 84 | 90 |
| Autonomy | 86 | 74 |
| Social Interaction | 93 | 58 |
| Home Navigation | 70 | 86 |
| Sensors | 720p RGB camera, 3D ToF, touch sensor, 3-axis accelerometer, 3-axis gyroscope, 4-mic array | 2× hemispherical 3D LiDAR (Hesai), 3× high-res cameras, 6× laser line sensors, wrist depth camera, IMU |
| Connectivity | Wi-Fi (2.4/5.8 GHz) | Wi-Fi 5.2, Ethernet, USB expansion |
| Ecosystem | Loona mobile app; ChatGPT conversation; Google Blockly programming; Auto-charge dock; Remote monitoring and FPV drive | ROS 2 Humble; Python SDK; Stretch Body software stack; Optional self-charging dock; Quick-release gripper tooling; Global distributor network (Japan, Korea, China) |
Green cells mark the stronger value in each row across 2 robots.